The New Adventures of Superman

The Return of Brainiac (1x12)

Air date: Oct 15, 1966

Brainiac returns to Earth on board a flying saucer. He uses a shrinking ray to shrink Lois and Jimmy. When Jimmy signals Superman, Superman is also hit with the shrinking ray. Superman must find some way to get back to normal size and must also protect Lois and Jimmy from now dangerous ants.