diff --git a/tensorboard/plugins/interactive_inference/tf_interactive_inference_dashboard/tf-interactive-inference-dashboard.html b/tensorboard/plugins/interactive_inference/tf_interactive_inference_dashboard/tf-interactive-inference-dashboard.html
index 814ff272e3..4ecd1ee720 100644
--- a/tensorboard/plugins/interactive_inference/tf_interactive_inference_dashboard/tf-interactive-inference-dashboard.html
+++ b/tensorboard/plugins/interactive_inference/tf_interactive_inference_dashboard/tf-interactive-inference-dashboard.html
@@ -3365,6 +3365,21 @@ <h2>Show similarity to selected datapoint</h2>
             observer: 'newInferences_',
             value: () => ({}),
           },
+          // Extra outputs from inference. A dict with two fields: 'indices' and
+          // 'extra'. Indices contains a list of example indices that
+          // these new outputs apply to. Extra contains a list of extra output
+          // objects, one for each model being inferred. The object for each
+          // model is a dict of output data names to lists of the output values
+          // for that data, one entry for each example that was inferred upon.
+          // 'attributions' is one of these output data which is parsed into the
+          // 'attributions' object defined below as a special case. Any other extra
+          // data provided are displayed by WIT with each example.
+          // @type {indices: Array<number>,
+          //        extra: Array<{!Object<string, Array<number|string>>}>}
+          extraOutputs: {
+            type: Object,
+            observer: 'newExtraOutputs_',
+          },
           // Attributions from inference. A dict with two fields: 'indices' and
           // 'attributions'. Indices contains a list of example indices that
           // these new attributions apply to. Attributions contains a list of
@@ -3944,12 +3959,16 @@ <h2>Show similarity to selected datapoint</h2>
           } else {
             this.comparedIndices = [];
             this.counterfactualExampleAndInference = null;
-            const temp = this.selectedExampleAndInference;
-            this.selectedExampleAndInference = null;
-            this.selectedExampleAndInference = temp;
+            this.refreshSelectedDatapoint_();
           }
         },
 
+        refreshSelectedDatapoint_: function() {
+          const temp = this.selectedExampleAndInference;
+          this.selectedExampleAndInference = null;
+          this.selectedExampleAndInference = temp;
+        },
+
         isSameInferenceClass_: function(val1, val2) {
           return this.isRegression_(this.modelType)
             ? Math.abs(val1 - val2) < this.minCounterfactualValueDist
@@ -6108,6 +6127,77 @@ <h2>Show similarity to selected datapoint</h2>
           this.updatedExample = false;
         },
 
+        newExtraOutputs_: function(extraOutputs) {
+          // Set attributions from the extra outputs, if available.
+          const attributions = [];
+          for (
+            let modelNum = 0;
+            modelNum < extraOutputs.extra.length;
+            modelNum++
+          ) {
+            if ('attributions' in extraOutputs.extra[modelNum]) {
+              attributions.push(extraOutputs.extra[modelNum].attributions);
+            }
+          }
+          if (attributions.length > 0) {
+            this.attributions = {
+              indices: extraOutputs.indices,
+              attributions: attributions,
+            };
+          }
+
+          // Add extra output information to datapoints
+          for (let i = 0; i < extraOutputs.indices.length; i++) {
+            const idx = extraOutputs.indices[i];
+            const datapoint = Object.assign({}, this.visdata[idx]);
+            for (
+              let modelNum = 0;
+              modelNum < extraOutputs.extra.length;
+              modelNum++
+            ) {
+              const keys = Object.keys(extraOutputs.extra[modelNum]);
+              for (let j = 0; j < keys.length; j++) {
+                const key = keys[j];
+                // Skip attributions as they are handled separately above.
+                if (key == 'attributions') {
+                  continue;
+                }
+                let val = extraOutputs.extra[modelNum][key][i];
+                const datapointKey = this.strWithModelName_(key, modelNum);
+
+                // Update the datapoint with the extra info for use in
+                // Facets Dive.
+                datapoint[datapointKey] = val;
+
+                // Convert the extra output into an array if necessary, for
+                // insertion into tf.Example as a value list, for update of
+                // examplesAndInferences for the example viewer.
+                if (!Array.isArray(val)) {
+                  val = [val];
+                }
+                const isString =
+                  val.length > 0 &&
+                  (typeof val[0] == 'string' || val[0] instanceof String);
+                const exampleJsonString = JSON.stringify(
+                  this.examplesAndInferences[idx].example
+                );
+                const copiedExample = JSON.parse(exampleJsonString);
+                copiedExample.features.feature[datapointKey] = isString
+                  ? {bytesList: {value: val}}
+                  : {floatList: {value: val}};
+                this.examplesAndInferences[idx].example = copiedExample;
+              }
+            }
+            this.set(`visdata.${idx}`, datapoint);
+          }
+          this.refreshDive_();
+
+          // Update selected datapoint so that if a datapoint is being viewed,
+          // the display is updated with the appropriate extra output.
+          this.computeSelectedExampleAndInference();
+          this.refreshSelectedDatapoint_();
+        },
+
         newAttributions_: function(attributions) {
           if (Object.keys(attributions).length == 0) {
             return;
diff --git a/tensorboard/plugins/interactive_inference/utils/inference_utils.py b/tensorboard/plugins/interactive_inference/utils/inference_utils.py
index a0af0f8e67..3ff6ac7988 100644
--- a/tensorboard/plugins/interactive_inference/utils/inference_utils.py
+++ b/tensorboard/plugins/interactive_inference/utils/inference_utils.py
@@ -615,12 +615,12 @@ def get_example_features(example):
 
 def run_inference_for_inference_results(examples, serving_bundle):
   """Calls servo and wraps the inference results."""
-  (inference_result_proto, attributions) = run_inference(
+  (inference_result_proto, extra_results) = run_inference(
     examples, serving_bundle)
   inferences = wrap_inference_results(inference_result_proto)
   infer_json = json_format.MessageToJson(
     inferences, including_default_value_fields=True)
-  return json.loads(infer_json), attributions
+  return json.loads(infer_json), extra_results
 
 def get_eligible_features(examples, num_mutants):
   """Returns a list of JSON objects for each feature in the examples.
@@ -795,8 +795,8 @@ def run_inference(examples, serving_bundle):
 
   Returns:
     A tuple with the first entry being the ClassificationResponse or
-    RegressionResponse proto and the second entry being a list of the
-    attributions for each example, or None if no attributions exist.
+    RegressionResponse proto and the second entry being a dictionary of extra
+    data for each example, such as attributions, or None if no data exists.
   """
   batch_size = 64
   if serving_bundle.estimator and serving_bundle.feature_spec:
@@ -822,14 +822,16 @@ def run_inference(examples, serving_bundle):
     # If custom_predict_fn is provided, pass examples directly for local
     # inference.
     values = serving_bundle.custom_predict_fn(examples)
-    attributions = None
+    extra_results = None
     # If the custom prediction function returned a dict, then parse out the
-    # prediction scores and the attributions. If it is just a list, then the
-    # results are the prediction results without attributions.
+    # prediction scores. If it is just a list, then the results are the
+    # prediction results without attributions or other data.
     if isinstance(values, dict):
-      attributions = values['attributions']
-      values = values['predictions']
-    return (common_utils.convert_prediction_values(values, serving_bundle),
-            attributions)
+      preds = values.pop('predictions')
+      extra_results = values
+    else:
+      preds = values
+    return (common_utils.convert_prediction_values(preds, serving_bundle),
+            extra_results)
   else:
     return (platform_utils.call_servo(examples, serving_bundle), None)
diff --git a/tensorboard/plugins/interactive_inference/witwidget/notebook/base.py b/tensorboard/plugins/interactive_inference/witwidget/notebook/base.py
index 297aa11172..72632da730 100644
--- a/tensorboard/plugins/interactive_inference/witwidget/notebook/base.py
+++ b/tensorboard/plugins/interactive_inference/witwidget/notebook/base.py
@@ -123,7 +123,7 @@ def infer_impl(self):
     examples_to_infer = [
         self.json_to_proto(self.examples[index]) for index in indices_to_infer]
     infer_objs = []
-    attribution_objs = []
+    extra_output_objs = []
     serving_bundle = inference_utils.ServingBundle(
       self.config.get('inference_address'),
       self.config.get('model_name'),
@@ -136,11 +136,11 @@ def infer_impl(self):
       self.estimator_and_spec.get('estimator'),
       self.estimator_and_spec.get('feature_spec'),
       self.custom_predict_fn)
-    (predictions, attributions) = (
+    (predictions, extra_output) = (
       inference_utils.run_inference_for_inference_results(
         examples_to_infer, serving_bundle))
     infer_objs.append(predictions)
-    attribution_objs.append(attributions)
+    extra_output_objs.append(extra_output)
     if ('inference_address_2' in self.config or
         self.compare_estimator_and_spec.get('estimator') or
         self.compare_custom_predict_fn):
@@ -156,16 +156,16 @@ def infer_impl(self):
         self.compare_estimator_and_spec.get('estimator'),
         self.compare_estimator_and_spec.get('feature_spec'),
         self.compare_custom_predict_fn)
-      (predictions, attributions) = (
+      (predictions, extra_output) = (
         inference_utils.run_inference_for_inference_results(
           examples_to_infer, serving_bundle))
       infer_objs.append(predictions)
-      attribution_objs.append(attributions)
+      extra_output_objs.append(extra_output)
     self.updated_example_indices = set()
     return {
       'inferences': {'indices': indices_to_infer, 'results': infer_objs},
       'label_vocab': self.config.get('label_vocab'),
-      'attributions': attribution_objs}
+      'extra_outputs': extra_output_objs}
 
   def infer_mutants_impl(self, info):
     """Performs mutant inference on specified examples."""
diff --git a/tensorboard/plugins/interactive_inference/witwidget/notebook/colab/wit.py b/tensorboard/plugins/interactive_inference/witwidget/notebook/colab/wit.py
index b50e08f7de..6ca2955547 100644
--- a/tensorboard/plugins/interactive_inference/witwidget/notebook/colab/wit.py
+++ b/tensorboard/plugins/interactive_inference/witwidget/notebook/colab/wit.py
@@ -120,8 +120,8 @@ def compute_custom_distance(wit_id, index, callback_name, params):
       window.inferenceCallback = inferences => {{
         wit.labelVocab = inferences.label_vocab;
         wit.inferences = inferences.inferences;
-        wit.attributions = {{indices: wit.inferences.indices,
-                            attributions: inferences.attributions}};
+        wit.extraOutputs = {{indices: wit.inferences.indices,
+                             extra: inferences.extra_outputs}};
       }};
 
       window.distanceCallback = callbackDict => {{
diff --git a/tensorboard/plugins/interactive_inference/witwidget/notebook/jupyter/js/lib/wit.js b/tensorboard/plugins/interactive_inference/witwidget/notebook/jupyter/js/lib/wit.js
index f30d48d0aa..a4ffdc499a 100644
--- a/tensorboard/plugins/interactive_inference/witwidget/notebook/jupyter/js/lib/wit.js
+++ b/tensorboard/plugins/interactive_inference/witwidget/notebook/jupyter/js/lib/wit.js
@@ -178,9 +178,9 @@ var WITView = widgets.DOMWidgetView.extend({
     const inferences = this.model.get('inferences');
     this.view_.labelVocab = inferences['label_vocab'];
     this.view_.inferences = inferences['inferences'];
-    this.view_.attributions = {
+    this.view_.extraOutputs = {
       indices: this.view_.inferences.indices,
-      attributions: inferences['attributions'],
+      extra: inferences['extra_outputs'],
     };
   },
   eligibleFeaturesChanged: function() {
diff --git a/tensorboard/plugins/interactive_inference/witwidget/notebook/visualization.py b/tensorboard/plugins/interactive_inference/witwidget/notebook/visualization.py
index bbd7e6c270..48b1ac417a 100644
--- a/tensorboard/plugins/interactive_inference/witwidget/notebook/visualization.py
+++ b/tensorboard/plugins/interactive_inference/witwidget/notebook/visualization.py
@@ -414,11 +414,11 @@ def set_custom_predict_fn(self, predict_fn):
       - For regression: A 1D list of numbers, with a regression score for each
         example being predicted.
 
-    Optionally, if attributions can be returned by the model with each
-    prediction, then this method can return a dict with the key 'predictions'
-    containing the predictions result list described above, and with the key
-    'attributions' containing a list of attributions for each example that was
-    predicted.
+    Optionally, if attributions or other prediction-time information
+    can be returned by the model with each prediction, then this method
+    can return a dict with the key 'predictions' containing the predictions
+    result list described above, and with the key 'attributions' containing
+    a list of attributions for each example that was predicted.
 
     For each example, the attributions list should contain a dict mapping
     input feature names to attribution values for that feature on that example.
@@ -432,6 +432,12 @@ def set_custom_predict_fn(self, predict_fn):
         a list of attribution values for the corresponding feature values in
         the first list.
 
+    This dict can contain any other keys, with their values being a list of
+    prediction-time strings or numbers for each example being predicted. These
+    values will be displayed in WIT as extra information for each example,
+    usable in the same ways by WIT as normal input features (such as for
+    creating plots and slicing performance data).
+
     Args:
       predict_fn: The custom python function which will be used for model
       inference.
@@ -464,11 +470,11 @@ def set_compare_custom_predict_fn(self, predict_fn):
       - For regression: A 1D list of numbers, with a regression score for each
         example being predicted.
 
-    Optionally, if attributions can be returned by the model with each
-    prediction, then this method can return a dict with the key 'predictions'
-    containing the predictions result list described above, and with the key
-    'attributions' containing a list of attributions for each example that was
-    predicted.
+    Optionally, if attributions or other prediction-time information
+    can be returned by the model with each prediction, then this method
+    can return a dict with the key 'predictions' containing the predictions
+    result list described above, and with the key 'attributions' containing
+    a list of attributions for each example that was predicted.
 
     For each example, the attributions list should contain a dict mapping
     input feature names to attribution values for that feature on that example.
@@ -482,6 +488,12 @@ def set_compare_custom_predict_fn(self, predict_fn):
         a list of attribution values for the corresponding feature values in
         the first list.
 
+    This dict can contain any other keys, with their values being a list of
+    prediction-time strings or numbers for each example being predicted. These
+    values will be displayed in WIT as extra information for each example,
+    usable in the same ways by WIT as normal input features (such as for
+    creating plots and slicing performance data).
+
     Args:
       predict_fn: The custom python function which will be used for model
       inference.