I Love Lucy (1951)

S6E13 Lucy and Superman

Stevie Appleby, Caroline's son, is celebrating his birthday on the same day as Little Ricky's party, prompting Lucy to seek out some unique entertainment to keep the kids engaged. Ricky recalls that Superman is in town and decides to invite him. However, when Ricky fails to manage Superman's arrival, Lucy has to step in and don the iconic costume herself. This episode features a special guest appearance by George Reeves.