Plot summary
Lord Nor ( Simon Templeman ) accuses Kal-El of treason and manages to prove that his marriage to Zara ( Justine Bateman ) was never consummated and the two of them are not planning to fulfill this duty. He claims that Kal plans to instead put a half human breed on the throne. The council tries Kal-El, finds him guilty and sentences him to banishment (a dispersal of his body across the universe). During the execution of the sentence, Nor behaves in a manner revealing his true intentions, forcing Trey ( J. G. Hertzler ), the tribunal chief, to Kal-El's side.
Ching ( Mark Kiely ) points out that Kal-El was not informed of the Kryptonian trial by combat laws, providing Trey with a legal reason to stop the banishment procedure. While Clark and Lord Nor fight, Lois finds out that a large amount of kryptonite reported missing some time ago has been stolen by the corrupt military colonel Cash, who is planning to kill all the Kryptonians with gas laced with it. Cash does not care if Superman might get injured or die since he sees him as a bigger threat than Lord Nor, and believes that killing everyone is the only way to stop them.
They use the kryptonite and manage to kill Lord Nor and his men but Superman survives. Colonel Cash ends up in jail. The Kryptonians leave Earth with Zara being the leader and married to Ching, while Clark stays on Earth with Lois.
Credits
Adapted from Wikipedia contributors, Lois & Clark: The New Adventures of Superman season 4. HTML formatting and reference markers removed.