Unfortunately, Spotify can't upload any tracks. Only the artists or content creators are able to upload content to Spotify.
Therefore, they can't upload that missing episode.
However, you can contact Perry Rhodan and tell him to upload that missing episode.
I'd recommend reading this article for more info on missing content.
Hope this helps! Good luck 🙂
Help others find this answer and click "Accept as Solution".
If you appreciate my answer, maybe give me a Like.
Note: I'm not a Spotify employee.