Lois and Clark: The New Adventures of Superman S2E22 May 21, 1995
Jace, a blackmailer, with Tempus' diary, finds out about Clark's identity and forces him to steal and do everything more that he wants...and one thing more (by Nigel's suggestion)....to kill Lois, or he kills Martha and Jonathan. Lois tells Clark the only way to save his parents is to freeze her, then she will look like a dead person, and he tells her this can be very dangerous to her