Fred and Ethel Fight
I Love Lucy Season 1

Hoping to patch up a quarrel between Fred (William Frawley) and Ethel (Vivian Vance), Lucy (Lucille Ball) and Ricky (Desi Arnaz) scheme to reunite the couple at a small dinner party. Unfortunately, this results in another argument -- between Lucy and Ricky. Conspiring with Ethel to win back her husband, Lucy pretends to have been injured in a bus accident. Yes, this is the episode in which our heroine is encased in a huge body cast -- only to be forced to vacate her bedroom in a hurry when Ricky, who is himself trying to get back into Lucy's good graces, fakes an apartment fire from which he plans to "save" her. (Watch for the not-so-subtle "plug" for I Love Lucy's then sponsor, Phillip Morris cigarettes.)