When does Baby Bob return?

The series centered on first-time parents Walter Spencer (Adam Arkin) and his wife Lizzy (Joely Fisher) and their six-month-old baby Bob (voiced by Ken Hudson Campbell) After discovering that their son can talk like an adult, Walter decides that they must keep it a secret. Supporting cast members included Elliott Gould as Walter's father Sam, and Marissa Tait as Bob's babysitter Teala. The Baby Bob character returned to television in a series of commercials for Quiznos television pitchman.