Plot summary
Lois and Clark discuss their wedding and even buying a house together when someone appears and tests Superman's strength, intelligence and morals. Following the clues, Lois and Clark are led to a couple, Zara ( Justine Bateman ) and Ching ( Jon Tenney ), who seem to know that Clark is Superman and they do not care that they are sacrificing earth people's lives to do more tests on Superman. When Superman passes the last test, Zara and Ching say that "he is the one" and they fly away to "inform the others" about it.
Lois and Clark try to understand who Zara and Ching are and they think that they might not be from Earth since they could fly like Superman. It is revealed that Zara and Ching are from Krypton and they discuss Superman saying that Clark has to leave Earth forever for their people's future and they have to find a way to tell him. While discussing, a male voice tells them that by finding Kal El, they signed his death warrant and the two of them seem scared.
Credits
Adapted from Wikipedia contributors, Lois & Clark: The New Adventures of Superman season 3. HTML formatting and reference markers removed.