Well, Danson went from bartender in Cheers to doctor in Becker, but now he is playing a shrink - which isn’t a huge stretch from doctor, so don’t know if it is fair to call this new character “different”. Will have to see the show, but previews seem to imply he is still the anti-social doctor he played on Becker.
And I believe Betty White still holds the record for actress with most television series.
There are total duds that come on the air every year. Becker was on for 6 full seasons. Did pretty well in the ratings too. Just because you don’t like something doesn’t make it a dud.
Kirstie Alley had a major role in Cheers and was the lead in Veronica’s Closet (not a huge hit but it lasted three seasons).
Harry Anderson was the lead on Night Court (eight seasons) and Dave’s World (four seasons).
John Larroquette was virtually a co-lead on Night Court (eight seasons) and then did three seasons of The John Larroquette Show.
Dick Van Dyke was the lead on The Dick Van Dyke Show (five seasons), The New Dick Van Dyke Show (three seasons), and later on non-sitcom Diagnosis Murder (eight seasons).
And Bob Denver deserves some kind of special mention. He played the character of Willy Gilligan on seven different series; as a regular on Gilligan’s Island and the cartoon series The New Adventures of Gilligan and Gilligan’s Planet and as a guest star in episodes of ALF, Baywatch, Meego, and The New Gidget (plus he played Gilligan in four different movies) - this must be a record.
Denver also had a major role in The Many Loves of Dobie Gillis and was the lead in Dusty’s Trails, The Good Guys, Far Out Space Nuts. Admittedly of the seven series he was in, only three lasted more than a single season and none made it to the five year mark.
Did the criteria change from two sitcoms to something else?
Okay, Jack Klugman in The Odd Couple and Quincy.
Bill Bixby in My Favorite Martian and The Incredible Hulk (of course he’s also got The Courtship of Eddie’s Father, so I guess he qualifies. We won’t mention The Magician).
[hijack]Richard Belzer has played Detective John Munch as a regular in Homocide: Life on the Street and Law & Order: Special Victims Unit plus guest shots in Law & Order, Law & Order: Trial by Jury, The X-Files, The Beat and Arrested Development. So seven shows stands, but apparently this is a record for prime-time.[/hijack]
Faith Ford went from wholesome, naive beauty queen Corky Sherwood in Murphy Brown to the sensible soccer mom in the utterly unwatchable Hope and Faith.
For that matter, Ted McGinley was the long-suffering husband in Hope and Faith after playing the empty-headed male gigolo in Married with Children.