That movie was shot in 86, so he looks a lot younger than he did even in Voyager 9 years later.
I haven't watched it in a very long time, have it on VHS, never got it on DVD. It's got some funny characters in it.
I didn't realize there was such a relative short amount of time between those two roles.
Yes, Innerspace is excellent. Unless you have an aversion for Martin Short doing slapstick. I understand some people don't like him anymore, but back when this was made, he was really funny.