Tonton Streaming Battle of the Planets (1978) S1E67 - Victims of the Hawk

A young, married couple stayed behind to help defend a base from an attack by Spectra. Both survived and were brought back to Earth as heroes. Zoltar wants to eliminate them (both are eyewitnesses to the Spectran attack) and both have parents that are highly placed in the government. He orders them kidnapped and brought to Spectra. It's up to G-Force to rescue the two from Zoltar.