G-Force [Mark; Princess; Jason; Tiny; Keyop]; 7-Zark-7; Zoltar; the Supreme One
G-Force is sent to the Bermuda Triangle to investigate a series of ship and plane disappearances. After they enter a mysterious cloud they see an ancient two-masted schooner, lose all power to the Phoenix and mysteriously fall unconscious. They wake up inside a metal whale that is also a missile base with some of the other missing people. They are then taken aboard the schooner and, along with the other captives, are hypnotized by Zoltar.
All of G-Force except Keyop, who is an android, are hypnotized. Keyop pretends to be hypnotized until he can sabotage the hypnotizing eye. When Keyop is caught in the control room Zoltar tries to hypnotize him again. Because the eye was sabotaged when it is used again G-Force breaks free of Zoltar's control. G-Force then takes control of the electronic whale and uses it to destroy the schooner, but, as always, Zoltar escapes.