I've only maybe seen a couple episodes of Lois and Clark, but I had no idea their Lex Luthor looked like a discount Warren Beatty.
There were several episodes where "Warren" was dating Lois and he was the perfect boyfriend. No zany evil side plots.... Until the Lex actor wanted to leave, so they bought out the Zany in spades where Lex sends an innocent orphan to jail for burning down the Daily Planet, so that she has to work at the Lex'O'Clock News, under his thumb, while her clone was...
I've said too much.