When Dave announces he's been invited to pitch his Hot Legs Duvet invention on "Shark Tank," Ken is excited. But then he gets nervous about throwing his son into the Tank when he realizes how tough the Sharks can be. Meanwhile, Molly heads to Welltopia to intern, and Pat is so impressed that he takes her under his wing.

When D.K. overhears Allison complain about him overstaying his welcome, he decides to move in with his girlfriend of three weeks. Meanwhile, Pat wants Dave to pretend he's his adopted son; and Allison is convinced Molly wants to talk about something when she suggests they do a spa day, but the tables turn when Molly is the one doling out the advice.