Jeannie gives Roger one birthday wish. Unwittingly Roger wishes he could
change with Tony, who is set to fly Trailblazer One. From then on, Tony and Roger inhabit each
other's bodies, although each has his own voice. Mrs. Bellows has a confusing meeting with
Roger. Unable to phone Roger, Tony and Jeannie go to the Officers Club. On his wife's report
of her strange encounter, Dr. Bellows picks up Roger at Tony's house. Tony, as Roger, has
difficulties at the Club, first with the Maitre D', and then with one of Roger's girlfriends.
Jeannie blinks up a bloodhound to find Roger. Dr. Bellows feels Tony has been working too
hard. Roger looks into a mirror and suddenly remembers his wish. Hot on the scent, the
bloodhound drags Jeannie and Tony on a wild chase. They cause chaos in a Chinese laundry,
almost drowning in starch, then at the NASA hospital where Dr. Bellows orders Nurse Fromkis to
hold Roger. Tony and dog are frozen is place when the laundry starch hardens. Hearing Tony and
Roger speak in each other's voices, Dr. Bellows runs for Gen. Peterson. Tony foils Bellows
with ventriloquism. Roger insists on going on the space flight in Tony's body. Jeannie finally
persuades him to take back his wish. Tony blasts off but Roger gets another wish from Jeannie.
Tony finds Roger on his lap as they rocket through space.