Superman - Season 1 Episode 7 Cybron Strikes

When Superman and Lois are celebrating her birthday with a flying trip into the sky, a metal pyramid floats down to them. Inside the pyramid is Cybron a hostile cyborg. Superman takes the pyramid to a government facility. At the facility, Cybron attacks and turns Lois, Jimmy, and the rest of the government officials into robots. Lois and Jimmy figure out that Superman is Clark Kent, but Superman takes them to STAR Lab where he devises a plan to deal with Cybron. His plan is to trap Cybron in a super-conductor. His plan works and everyone is returned to normal. Fortunately for Superman, Lois and Jimmy's memories are wiped clean.