Johnny Galecki Makes Return to Reboot of ‘Roseanne’

'Big Bang Theory' star Johnny Galecki will make a guest appearance on Tuesday's episode of ABC's rebooted comedy 'Roseanne'. Galecki will return to his role from the original series of David Healy, the husband of Darlene Connor who is played by Sara Gilbert. On the new version of "Roseanne" David and Darlene, who dated throughout the show's original run, are revealed to have split up.