Can someone tell me what episode I'm thinking of? I forgot which one it was

It was on a video tape (VHS) anyway

somewhere in the video uncle matt goes out into "outer space", and at the end I think wembley "beats up" "the monster" (sprocket) and gobo goes out to get the postcards that are in doc's garbage can. Can someone tell me the episode title please?

The episode where Uncle Matt goes intoOuter Space is called "Born to Wander"  episode# 62, season 3, disc 3.  Gobo goes to get a postcard in Docs' workshop almost every episode.  Wembley does beat up the monster/sprocket  in "A Friend in Need" episode#34, season 2,disc 2.