An hour with Roseanne Barr and, her then-fiancé, Tom Arnold, who enters the picture at 19:08.
I couldn't track down the exact date for this episode. The end credits, which would have given me the year, are cut short but I'm fairly confident this was broadcast in late November or in the month of December in 1989; there was a Christmas flyer commercial. Also, an audience member makes a specific reference to the S2 episode "Sweet Dreams," which aired on November 7, 1989.