diff --git a/src/components/timeline/form/TimelineEditorLayerFilter.svelte b/src/components/timeline/form/TimelineEditorLayerFilter.svelte
index c2baa5be9f..de142497de 100644
--- a/src/components/timeline/form/TimelineEditorLayerFilter.svelte
+++ b/src/components/timeline/form/TimelineEditorLayerFilter.svelte
@@ -10,7 +10,7 @@
 
   export let layer: Layer;
   export let values: string[];
-  export let options: string[];
+  export let options: string[] = [];
 
   const dispatch = createEventDispatcher();
 
diff --git a/src/components/timeline/form/TimelineEditorPanel.svelte b/src/components/timeline/form/TimelineEditorPanel.svelte
index 2b74963fff..cc73c88382 100644
--- a/src/components/timeline/form/TimelineEditorPanel.svelte
+++ b/src/components/timeline/form/TimelineEditorPanel.svelte
@@ -28,6 +28,7 @@
     viewUpdateRow,
     viewUpdateTimeline,
   } from '../../../stores/views';
+  import type { ActivityType } from '../../../types/activity';
   import type {
     ActivityLayer,
     Axis,
@@ -431,15 +432,16 @@
     return [];
   }
 
-  function getFilterOptionsForLayer(layer: Layer) {
+  function getFilterOptionsForLayer(layer: Layer, activityTypes: ActivityType[], externalResourceNames: string[]) {
     if (layer.chartType === 'activity') {
-      return $activityTypes.map(t => t.name);
+      return activityTypes.map(t => t.name);
     } else if (layer.chartType === 'line' || layer.chartType === 'x-range') {
       return $resourceTypes
         .map(t => t.name)
-        .concat($externalResourceNames)
+        .concat(externalResourceNames)
         .sort();
     }
+
     return [];
   }
 
@@ -945,7 +947,7 @@
                     </span>
                     <TimelineEditorLayerFilter
                       values={getFilterValuesForLayer(layer)}
-                      options={getFilterOptionsForLayer(layer)}
+                      options={getFilterOptionsForLayer(layer, $activityTypes, $externalResourceNames)}
                       {layer}
                       on:change={event => {
                         const { values } = event.detail;
diff --git a/src/routes/plans/[id]/+page.svelte b/src/routes/plans/[id]/+page.svelte
index 37ecfc1a43..633c427b9f 100644
--- a/src/routes/plans/[id]/+page.svelte
+++ b/src/routes/plans/[id]/+page.svelte
@@ -52,6 +52,7 @@
     activityTypes,
     maxTimeRange,
     plan,
+    planDatasets,
     planEndTimeMs,
     planId,
     planLocked,
@@ -157,7 +158,6 @@
   let windowWidth = 0;
   let simulationDataAbortController: AbortController;
   let resourcesExternalAbortController: AbortController;
-  let externalDatasetNamesAbortController: AbortController;
 
   $: ({ invalidActivityCount, ...activityErrorCounts } = $activityErrorRollups.reduce(
     (prevCounts, activityErrorRollup) => {
@@ -290,12 +290,16 @@
     initializeView({ ...data.initialView });
   }
 
-  $: if ($plan) {
-    externalDatasetNamesAbortController?.abort();
-    externalDatasetNamesAbortController = new AbortController();
-    effects
-      .getExternalDatasetNames($plan.id, data.user, externalDatasetNamesAbortController.signal)
-      .then(names => ($externalResourceNames = names));
+  $: if ($plan && $planDatasets) {
+    let datasetNames = [];
+
+    for (const dataset of $planDatasets) {
+      for (const profile of dataset.dataset.profiles) {
+        datasetNames.push(profile.name);
+      }
+    }
+
+    $externalResourceNames = [...new Set(datasetNames)];
 
     resourcesExternalAbortController?.abort();
     resourcesExternalAbortController = new AbortController();
diff --git a/src/stores/plan.ts b/src/stores/plan.ts
index eb48097c57..5cd1f438cb 100644
--- a/src/stores/plan.ts
+++ b/src/stores/plan.ts
@@ -2,6 +2,7 @@ import { derived, writable, type Readable, type Writable } from 'svelte/store';
 import type { ActivityType } from '../types/activity';
 import type { ModelSlim } from '../types/model';
 import type { Plan, PlanMergeRequest, PlanMergeRequestSchema } from '../types/plan';
+import type { PlanDataset } from '../types/simulation';
 import type { Tag } from '../types/tags';
 import type { TimeRange } from '../types/timeline';
 import gql from '../utilities/gql';
@@ -47,6 +48,8 @@ export const planTags = gqlSubscribable<Tag[]>(gql.SUB_PLAN_TAGS, { planId }, []
 
 export const models = gqlSubscribable<ModelSlim[]>(gql.SUB_MODELS, {}, [], null);
 
+export const planDatasets = gqlSubscribable<PlanDataset[]>(gql.SUB_PLAN_DATASET, { planId }, [], null);
+
 export const planLocked = gqlSubscribable<boolean>(
   gql.SUB_PLAN_LOCKED,
   { planId },
diff --git a/src/utilities/effects.ts b/src/utilities/effects.ts
index 2b9d741531..b8a8d00f7d 100644
--- a/src/utilities/effects.ts
+++ b/src/utilities/effects.ts
@@ -112,7 +112,6 @@ import type {
 } from '../types/sequencing';
 import type {
   PlanDataset,
-  PlanDatasetNames,
   Profile,
   Resource,
   ResourceType,
@@ -2580,44 +2579,6 @@ const effects = {
     }
   },
 
-  async getExternalDatasetNames(
-    planId: number,
-    user: User | null,
-    signal: AbortSignal | undefined = undefined,
-  ): Promise<string[]> {
-    try {
-      const data = await reqHasura<PlanDatasetNames[]>(
-        gql.GET_PROFILES_EXTERNAL_NAMES,
-        {
-          planId,
-        },
-        user,
-        signal,
-      );
-      const { plan_dataset: plan_datasets } = data;
-
-      if (plan_datasets != null) {
-        const resourceNames: string[] = [];
-
-        for (const dataset of plan_datasets) {
-          for (const profile of dataset.dataset.profiles) {
-            resourceNames.push(profile.name);
-          }
-        }
-
-        return [...new Set(resourceNames)];
-      } else {
-        throw Error('Unable to get external resource names');
-      }
-    } catch (e) {
-      const error = e as Error;
-      if (error.name !== 'AbortError') {
-        catchError(error);
-      }
-      return [];
-    }
-  },
-
   async getModels(user: User | null): Promise<ModelSlim[]> {
     try {
       const data = await reqHasura<ModelSlim[]>(gql.GET_MODELS, {}, user);
diff --git a/src/utilities/gql.ts b/src/utilities/gql.ts
index a36329eda5..b0857e32b6 100644
--- a/src/utilities/gql.ts
+++ b/src/utilities/gql.ts
@@ -1683,6 +1683,23 @@ const gql = {
     }
   `,
 
+  SUB_PLAN_DATASET: `#graphql
+    subscription SubPlanDatasets($planId: Int!) {
+      plan_dataset(where: {plan_id: {_eq: $planId}}) {
+        dataset_id
+        simulation_dataset_id
+        dataset {
+          profiles {
+            duration
+            id
+            name
+            type
+          }
+        }
+      }
+    }
+  `,
+
   SUB_PLAN_LOCKED: `#graphql
     subscription SubPlanLocked($planId: Int!) {
       planLocked: plan_by_pk(id: $planId) {