Leave It to Beaver (1957)

S6E15 The Mustache

Title: The Mustache Plot: Wally's relationship with Julie Foster takes a turn when she starts dating a new student sporting a mustache. Feeling hurt and insecure after Eddie reveals that Julie perceives him as childish, Wally resolves to grow his own mustache. His family, however, is less than thrilled about his new decision, leading to comedic moments as he attempts to transform his image in hopes of winning Julie back.