is the 18th episode of Family Guy's eighth season, which first aired on May 9, 2010. Episode Plot Summary
: After Quagmire’s friends initially suspect Dan might be gay, Dan reveals he is actually "a woman trapped in a man's body" and plans to undergo gender reassignment surgery. 18. Quagmire's Dad
: Quagmire struggles deeply to accept his father's new identity. Meanwhile, in a notorious subplot, Brian unwittingly has sex with Ida before discovering her previous identity as Quagmire's father. Key Character Details is the 18th episode of Family Guy's eighth