The Scales of Justice

S2 E11: When Will (Eric McCormack) discovers Karen's (Megan Mullally) estranged stepdaughter Olivia (guest star Aya Cash) is a student in his law class, he attempts to solve their issues with a mock trial. Grace (Debra Messing) and Jack (Sean Hayes) go on a diet together, but giving up their eating habits proves harder than anticipated.