Thanks to Olbermann for the reminder.
"On November 13th, Felix Unger was asked to remove himself from his place of residence. That request came from his wife. Deep down he knew she was right, but he also knew that someday he would return to her. With nowhere else to go, he appeared at the home of his childhood friend, Oscar Madison. Sometime earlier Madison's wife had thrown him out, requesting that he never return. Can two divorced men share an apartment without driving each other crazy?"
If they remade that today, they'd make a far bigger deal of the fact that Felix's initials are F!U!