Rebecca McFarland

Charlie agrees to meet with a former girlfriend who ended their relationship years earlier, leaving Charlie devastated. But Charlie's in for a huge surprise when he discovers that she is now a he, and he, Bill, wants to be Charlie's friend.

Charlie and Jake convince Alan to get a makeover when it appears Judith is moving forward since the breakup, sporting a new hairdo and new date. But when Charlie takes Alan shopping, the brothers clash over what image is right for him.

Jane and the CBI try to narrow down the list of suspects when a terminally ill man is found murdered. Meanwhile, Cho is forced to face his demons.

When Walden sells Charlie's piano, Alan goes off the deep end and starts channelling his inner Charlie.

Walden starts dating Rose. This news shocks Alan and he tries to warn Walden about Rose, describing her tactics and history with Charlie, but Walden disregards them as Rose explained everything to him.

Charlie helps Alan with his obsession of always having to get approval from the women in his life.