Mike and Martina haven't had sex since the girls moved back in and they're not sure why. Each tries to spice things up in their own way. Stella coaches Shea on how to snag boys with a dating app.

When Mike's step-brother Ethan comes to town, Mike has to deal with Bob's blatant favoritism. However, Mike soon learns that Ethan has secrets and is not doing as well as Bob thinks. Stella and Shea team up to beat their parents at family game night after learning that they had been letting them win all these years.

Mike learns that Kyle, a guy who bullied him in school, is now in prison. Shunning his father's advice, Mike decides to pay Kyle a visit (with Martina in tow) to show him how well his life has turned out. This inspires Stella to meet up with a nerd she once bullied named Elliot so she can apologize to him, but it leads to something else.

Mike and Martina set their friend John up with a new girl in order to "Frankenstein" the perfect friend-couple, but when John's ex finds out about it, the whole thing blows up in their faces. Shea, Stella and Ethan take over Bob's bar.

The family celebrates Bob and Alice's anniversary by going to the movies, but things don't go as planned when Mike and Martina find a positive pregnancy test.

One of Martina's patients moves in and refuses to leave. Mike misses his mother. Shea gets a boyfriend. Stella gives Martina's patient a makeover.

Martina, Stella and Shea join forces to find Mike's mother. Bob and Mike attract attention when they banter as traffic reporters in Mike's helicopter.

Stella becomes a webcam gal. Shea takes a job at a fast food restaurant. Ethan's crush on Shea grows. Bob and Alice disagree about end-of-life issues.

Mike and Martina experiment with Viagra, while Stella receives harsh criticism over her YouTube channel.

Stella scores Pearl Jam tickets for Mike through her boyfriend, but when Mike finds out the guy is married, he struggles with whether or not to tell her. Meanwhile, Martina and Bob bond at a shooting range and Alice teaches Shea how to "play it cool" with the guy she's seeing.

Stella, Shea and Martina assume Ethan is gay after they spot him at a male strip club; and Mike and Bob compete to see who's more attractive to other men.

The whole family heads to Bob's cabin in the woods where they discover Mike's mother, Linda, has been hiding from the law. The past gets rehashed and the family gets some closure, but a secret is revealed that could change everything.