Photo Flash: TWO AND A HALF MEN's 'Throgwarten Middle School Mysteries'

On TWO AND A HALF MEN's upcoming episode, titled "Throgwarten Middle School Mysteries," when Walden runs into his ex-wife at a high-end singles mixer and they talk about getting back together, Alan worries that she's not good for Walden, on Thursday, Feb. 21 (8:31 - 9:01 PM, ET/PT) on CBS. Judy Greer returns as Bridget, Walden's ex-wife.

Check out a first look below!