diff --git a/frontend/src/Calendar/CalendarPageConnector.js b/frontend/src/Calendar/CalendarPageConnector.js
index 74261c0cd..9ed29c4ae 100644
--- a/frontend/src/Calendar/CalendarPageConnector.js
+++ b/frontend/src/Calendar/CalendarPageConnector.js
@@ -25,7 +25,7 @@ function createMissingEpisodeIdsSelector() {
           moment(airDateUtc).isAfter(start) &&
           moment(airDateUtc).isBefore(end) &&
           isBefore(episode.airDateUtc) &&
-          !queueDetails.some((details) => details.episode.id === episode.id)
+          !queueDetails.some((details) => !!details.episode && details.episode.id === episode.id)
         ) {
           acc.push(episode.id);
         }