Starring Dennis Quaid,
Martin Short, and Meg Ryan, InnerSpace was released in
1987. In this movie, Lt. Tuck Pendelton (Quaid),
who is working on shrink technology, is injected into
the blood stream of Jack Putter (Short), where he
quickly navigates to Jack's brain and makes contact.
Tuck must find a way to get out of Jack before his ship
changes back to normal size, and Jack is falling for
Tuck's ex-girl (Ryan).