02/15/2012 (08:00PM - 08:30PM) (Wednesday) : WHEN YOU KNOW-After Mark (Dan O'Brien) breaks it off with yet another woman, he shares his personal theory -- explaining that couples know within 48-hours of meeting if they want to be together. Not surprisingly, everyone agrees that they knew they had met their soul mates within that timeframe except Whitney (Whitney Cummings). Trying to prove her wrong, Alex (Chris D'Elia) takes Whitney on a trip back to 2008 and the night they first met. While reminiscing, it is discovered that Lily (Zoe Lister-Jones) and Roxanne (Rhea Seehorn) needed some special help to discover that they might actually like each other. Maulik Pancholy also stars and Hayes MacArthur guest stars.