diff --git a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ImageGalleryController.java b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ImageGalleryController.java
index 0984d7bb93..ac6b844c3e 100644
--- a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ImageGalleryController.java
+++ b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ImageGalleryController.java
@@ -348,6 +348,7 @@ public final class ImageGalleryController {
         LOGGER.info("resetting ImageGalleryControler to initial state.");
         selectionModel.clearSelection();
         setListeningEnabled(false);
+        ThumbnailCache.getDefault().clearCache();
         Platform.runLater(() -> {
             historyManager.clear();
         });
diff --git a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ThumbnailCache.java b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ThumbnailCache.java
index 0aab44e58c..ee7c74e981 100644
--- a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ThumbnailCache.java
+++ b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ThumbnailCache.java
@@ -83,6 +83,13 @@ public enum ThumbnailCache {
     /** thread that saves generated thumbnails to disk for use later */
     private final Executor imageSaver = Executors.newSingleThreadExecutor(new BasicThreadFactory.Builder().namingPattern("icon saver-%d").build());
 
+    /**
+     * Clear out the cache between cases
+     */
+    public final void clearCache() {
+        cache.invalidateAll();
+    }
+    
     /** get the cached thumbnail for the given file or generate a new one if
      * needed
      *