Fugitive From Space - S1.E3

When STAR labs discovers an alien space ship, they call Lois, Clark, and Jimmy to help document the craft. When they go into the ship they discover two aliens in suspended animation. These aliens, however, are awakened when Jimmy accidentally presses a button. One of the aliens is a police officer, the other is a criminal that wants to take over the planet. Superman must figure out who is who and must find some way of stopping the criminal.