Dee receives e-mails from a stranger claiming to be her and Dennis' real father. Meanwhile, Mac decides to visit his father who is in prison.

When Dennis is mistaken for a recently released child molester, he is more bothered by the fact that the guy is overweight rather than him being a sex offender. Meanwhile, Mac tries once again to bond with his ex-con father, who shows an interest in Dee.

Part 1 of 2. Mac and Charlie fake their deaths to avoid the wrath of Mac's father who was released from prison and is out for vengeance.

Part 2 of 2. Dennis, Frank, and Dee find unique ways of coping with the apparent loss of their friends.

After years of being mistreated by Frank during the holiday season, Dennis and Dee decide to teach him a lesson. Meanwhile, Mac and Charlie reflect on their childhood Christmases, and realize that they were not as joyous and wonderful as they remembered.

News surfaces about Mac's Dad, Luther, being a murder suspect. Mac goes into full "P.I." mode to clear his father of any wrong doing.

Dee dates a male stripper and tries to prove her worth after learning she's his "rock bottom." Elsewhere: Mac and Frank get sucked into a VR war game, leading Mac to develop a case PTSD.

Frank tries to recruit Mac for the gang’s kickass float for the Gay Pride Parade. It dawns on Frank that Mac will never be secure with his sexual identity unless he comes out to his father.