Goof: At the end, when Maggie and Quinn land in the futuristic world, Quinn concludes that they've gone into the future, although he has previously stated in such episodes as "The Guardian", that they cannot travel in time.
Maggie: I've never heard a man snarl like that.
Quinn: You didn't know the Professor that well!
Maggie: So how do we get you home?
Quinn: I don't know...