TV Dogs - Dogs Appearing on Television

Brandon, Golden Retriever on Punky Brewster
Buck from Married... with Children
Charlie Dog
Chester, spoiled Pomeranian belonging to Cece Babcock on The Nanny
Diefenbaker, the half-wolf dog from Due South
Eddie, the Jack Russell Terrier from Frasier
Flash The Basset Hound from The Dukes of Hazzard
Fred, "Little Ricky's" puppy in I Love Lucy
K-9, a canoid robot in Doctor Who
K-9, sidekick of Marvin the Martian
K-9 Cop
Lassie, see Dogs in film, above
London the Wonder Dog in The Littlest Hobo, Canadian television series in the late 1950s and early 1960s; and the remake circa 1980s.
Maximillian (Max-a-Million), the Bionic Dog from The Six Million Dollar Man
Porthos, the Beagle owned by Captain Archer in Star Trek: Enterprise
Rex from Kommissar Rex (aka Inspector Rex and Rex: A Cop's Best Friend), Austrian/German TV series set in Vienna (1994 - ) (see photos) (http://mingo.gmxhome.de/kr/wp/rex_team_1024x768.jpg)
Tiger from The Brady Bunch
Truffles (played by Pussy Galore) Mildred's terrier in the British sitcom George & Mildred
Wishbone, the eponymous Jack Russell Terrier star of a children's educational series featuring literary themes and their application to issues faced by young viewers