7x13 - Super Friends

The three Phantom Zone villains are freed by an alien who doesn't realise they are criminals. In this episode they force the alien to travel back in time with them in an attempt to alter Superboy's life...hoping that he will never grow up to become Superman. Meanwhile, in the future, Superman and Green Lantern learn of the plot from the alien and travel back in time to save Superman's own past and capture the Phantom Zone villains.