Galecki was tapped to return as David for one episode, which was a little disappointing for fans who were hoping he'd be a bigger part of the series. Galecki said that filming for the revival was incredibly emotional though, and that he even got to give some input on where David would be in his life when Roseanne returned.
"[Sara Gilbert] gave all the cast members kind of full rein to contribute where they thought their characters would be 20 years later, so it was very much a team collaboration," Galecki told TV Guide at the Television Critics Association winter press tour. "It was just one of the best weeks of my life. It was very, very emotional. It was kind of like what I would imagine going to your 20-year high school reunion was, but all the people are like still your heroes."
As for what to expect from David's visit to the revival, Galecki would only hint that we should expect some surprises when it comes to him as a father.
"David returns in the Roseanne revival as not the husband and father that we may have predicted he would turn out to be," Galecki says.
The Roseanne revival premieres Tuesday, March 27 at 8/7c on ABC.