Peter and Quagmire mimic each other's behavior when they accidentally switch underwear; Stewie and Doug agree to commit each other's murders.
Runtime: 22 min
Starts: Seth MacFarlane, Alex Borstein, Seth Green, Mila Kunis, Mike Henry, Chris Parnell, Patrick Warburton, Arif Zahir, Dee Bradley Baker, Emily Osment, Patton Oswalt