Natalie Distler

As Tommy plots to sabotage Black Shawn's chances of marrying Colleen, Lou looks to spark a romance with a Frenchwoman who is writing a book about 9/11.

Mike's Christmas spirit gets dampened when Ryan (Nick Jonas, guest star), the father of Kristen's baby, unexpectedly comes back to town after a long absence. Kristin's boyfriend, Kyle, also doesn't know what to make of Ryan's return. Meanwhile, Ed hires Mandy as an elf at Outdoor Man, where she tries to unionize the other elves to get better perks.

A close look at video footage from 9/11 leads Tommy to suspect that Jimmy didn't actually die in the World Trade Center attack.

Sean looks to uncover the secret that Mike is hiding in his late mother's bedroom, while Tommy struggles to understand the deal Lou struck with a basketball-playing rookie firefighter.

After bribing Colleen for access to the baby and information about Janet, Tommy gains a surprising insight into his childhood during a conversation with his dad.

As an arson investigation following the beach house fire targets Tommy, Janet worries that her new baby doesn't like her and Sean tries to cope with Maggie's porn collection.