Lois & Clark: The New Adventures of Superman

The Newtrich sisters want to hit Superman with a ""Red Kryptonite"" beam (the kryptonite from the episode Individual Responsabilty). But instead of make Superman apathetic, the beam transferred his powers to Lois. Now, she needs a secret identity...to do Superman's job. After a while, Clark begins to feel upset because he has no powers anymore. Perry's wife Alice leaves him. When Lois feels what is to be a super-hero, she realizes that she loves Clark even more and proposes to him.