Which Full House episode first has Vicky Larson fill in for Becky?

The first Full House episode in which Vicky Larson fills in for Becky is “Nicky and/or Alexander.”

The episode is part of season five and follows Becky’s return home after giving birth to Jesse and Becky’s twin sons. Because Becky is on maternity leave, Vicky temporarily takes over as Danny’s co-host on Wake Up, San Francisco. This professional substitution introduces Vicky to the Tanner family and begins her connection with Danny.

The episode title refers to the comic confusion surrounding the newborn twins. Jesse struggles to tell Nicky and Alex apart after their identifying name signs and colored booties are removed, creating the episode’s main family storyline alongside Vicky’s arrival.

A frequent mix-up is “Easy Rider,” which is the episode where Danny and Vicky begin dating two episodes after they meet. “Play It Again, Jesse” instead focuses on Becky’s return and Vicky’s Chicago job offer, while “The Perfect Couple” comes much later, during Danny and Vicky’s engagement.