For any television series reaching its 100th episode, looking back is a given, but there aren’t many shows with a 35-year history like ABC’s “The Conners,” the sitcom following the blue-collar family with an affinity for getting knocked down by life’s struggles while making us laugh along the way. “It’s just lucky, I guess,” says John Goodman, who plays patriarch Dan Conner. “Now all of a sudden, it’s 100 episodes. I can’t believe how fast the time went by, but I guess that’s just because I’m getting old.”
We first met the Lanford, Ill., clan on Oct. 18, 1988, when “Roseanne,” named for brash standup comedian Roseanne Barr, premiered on ABC. The cast included Roseanne’s big-hearted husband Dan (Goodman), their three salty young children Becky (Lecy Goranson), Darlene (Sara Gilbert)…