Startling conclusion!
When the astronauts Burke and Virdon, with their chimp companion Galen, are captured in a fishing village that employs human slave labor, they must prove their worth as fishermen or be sacrificed to the 'gods of the sea,' or what the men call sharks. Escaping from the forced labor camp, the trio become involved in a plot to develop a glider to drop a fragmentation bomb on the gorilla council. [The fifth of five telefilms edited from episodes of the 1974 TV series; this film combines the episodes "Tomorrow's Tide" and "Up Above the World So High"]
Streaming availability for US region, via JustWatch.

Beneath the Planet of the Apes
1970

Stargate SG-1: Children of the Gods
2009

Megaboa
2021

Planet of the Apes
1968

Super Eruption
2011

Doctor Who: Planet of the Dead
2009

Doctor Who: Voyage of the Damned
2007

Roswell
1994

Chaos on the Bridge
2014

Behind the Planet of the Apes
1998