In which TV series is Hannibal Smith a main character?

In which TV series is Cliff Clavin a main character? Who played Carla Tortelli in 'Cheers'? In which TV series is Alex P. Keaton a main character? Who played Hannibal Smith in 'The A-Team'? Who played Sonny Crockett in 'Miami Vice'? Who played Rico Tubbs in 'Miami Vice'? In which TV series is Rico Tubbs a main character? Who played Clair Huxtable in 'The Cosby Show'?