Description by couchtuner for 30 Rock Season 3 Episode 21 : Liz concocts a Mamma Mia!-type scenario to help Jack find his father. Pete and Liz feel Tracy’s illegitimate child is really a scam artist. Jenna reluctantly shares credit for a new TGS catchphrase with Liz.
Watch It Here :30 Rock Season 3 Episode 21 Mamma Mia
