TheWrap.com has a list of 'The 10 Worst Sitcoms of All Time.' They are, in no particular order:
1. "Cavemen", ABC, 2007. It only lasted one season.
2. "George", ABC, 1993-1994. It only lasted one season and starred George Foreman.
3. "Harry & the Hendersons", syndication, 1991 to 1993. It lasted three seasons.
4. "Homeboys in Outer Space", UPN, 1996 to 1997. It only lasted one season.
5. "Ferris Bueller", NBC, 1990 to 1991. It only lasted one season.
6. The "Friends" spin-off "Joey", NBC, 2004 to 2006. It lasted two seasons.
7. "Yes, Dear", CBS, 2000 to 2006. It lasted six seasons.
8. "Dads", Fox, 2013 to 2014. It only lasted one season.
9. "AfterMASH", CBS, 1983 to 1985. It lasted two seasons.
10. "Rob!", CBS, 2012. It only lasted one season and starred Rob Schneider.