I think some puppets and horses from Four Feather Falls are reused for this episode.

I was really expecting this thing to turn out to be another dream sequence. They rather implied that it would be, when they showed Professor Matic in bed, mumbling about staying away from his machine.

Why on Earth did the Professor turn his key over to Lt. 90? What was the point? (The point, of course, was for Commander Zero and Steve to pull rank on the poor Lieutenant and force him to hand over the key.)

It was very childish of Zero, Steve and Venus to ignore the Professor's orders just so that they could indulge their curiosity, a curiosity that would have been satisfied in a few short hours anyway. And Venus was a perfect tootie for bringing Zoonie along, knowing his penchant for messing around with things.

Why did their clothes alter during the trip? Why did they lose most of their memories? Why did Steve and Zero's names stay the same, but not Venus'? And how is it that two people in the past recognized two from the future?

Frenchy Lil commented that there were only books in the bank vault. Where did she find that nice little pile of money?

Why was it necessary for Venus to be concious for the return trip? The Professor retrieved Robert, who has no conciousness to speak of.

That was quite an interesting pose with Steve and Venus at the very end. Perhaps Steve is no longer taking doctors of space medicine for granted....