Two lab mice are always plotting in this spin-off from 'Steven Spielberg's Animaniacs.' The series aired in prime time for one season and during the day (weekdays and Saturdays) for four. A 'Pinky' spin-off, 'Pinky, Elmyra and the Brain,' ran on WB during the 1998-99 series. (Elmyra was a character from the cartoon series 'Tiny Toon Adventures.')