The surprise hit of the summer of 1963, Flipper is a thoroughly captivating outdoor adventure from the Ivan Tors factory. Sandy Ricks (Luke Halpin), the young son of Florida fisherman Porter Ricks (Chuck Connors), nurses a wounded dolphin back to health. His father would prefer that Sandy allow the dolphin to return to its natural habitat, but Sandy has other ideas. After "Flipper" rescues Sandy from a shark, however, the boy grants the dolphin his freedom. Ideally suited for audiences of all ages, Flipper was fully deserving of its success; within a year, it had spawned a theatrical sequel and a long-running TV series, which, like the film, cast Suzy the Dolphin as the "hero" Flipper.
~ Hal Erickson, All Movie Guide