Law & Order: Special Victims Unit
Bang
S12 E22:
When an abandoned baby is found on playground, Detectives Benson (Hargitay) and Stabler (Meloni) go in search of the child's caregiver. Upon meeting the nanny and her boyfriend, Ken Turner (guest star John Stamos), they soon realize that he is also engaged.
Starring
Lori Singer, John Stamos, Noelle Beck