When Ben receives an anonymous note from a past love interest asking for a second chance, he does whatever he can to find the mystery girl. Danny misunderstands a note he thought was left for him and tries to get Riley back. Tucker, Riley and Bonnie enter Emma into a baby beauty pageant to get footage for Tucker’s news segment, but Riley goes too far.

Ben attempts to work out who should receive custody of Emma in the event of anything bad happening to him.

The gang head to Las Vegas, where Tucker's hidden hobby is exposed.

In the Season 4 finale, Bonnie's wedding planner quits as her big day draws near, so her best buddy, Charlotte, volunteers to help, but Charlotte has an ulterior motive. Meanwhile, Ben decides to let Danny and Riley have a shot at romantic happiness.

Riley is confined to the couch with the baby due any second while Tucker tries to help Danny decide what to buy her as a “push gift.” Ben begins to feel like an insufficient parent when Emma’s upcoming mother-daughter talent show leads Emma to ask questions about why she doesn’t have a mother.

Bonnie's new boss gives her an impossible apartment listing.

Ben, Danny and Tucker end up in jail when their plans to attend a big Halloween party go awry.

Danny prepares to join Georgie in Paris; Ben suspects that Riley may have feelings for his brother; Bonnie begins selling Danny's hockey memorabilia.

Ben learns why Riley doesn’t like celebrating her birthday and it’s all his fault. He knows he needs to make it up to her and plans a perfect birthday surprise, but in typical Wheeler fashion, disaster ensues. Bonnie realizes she may have made a mistake in filing Emma’s parental rights paperwork and Ben doesn’t officially have sole custody. Bonnie enlists Tucker’s help in tracking down Emma’s mother, Angela, to re-sign the papers. Meanwhile, Amy calls Danny on his lingering feelings for Riley.

It's Emmas first christmas family photo and Ben wants the whole family on it, including his dad.

Riley wonders if Ben should give family life with Angela a shot.

Tucker scores Danny an interview on the Mary Hart Show.

The guys start a campaign to be on their building's Resident Board so they can keep their rooftop beach. Riley and Bonnie go on a double date.

Ben and Tucker swap names while pursuing a woman. Elsewhere, Riley runs into a former rival and enlists Danny in a revenge scheme; and Bonnie gets Tucker to assist her in creating a slogan for her new business.

Ben tries to score a second date with Heather in order to win a wager with Riley. Elsewhere, Bonnie asks Danny to end her relationship with Brad for her, and then she becomes interested in Brad's dad; and Tucker uses Emma to improve his dating life.

Tucker pretends to be a lawyer in order to please his dad, and Ben helps with the charade. Meanwhile, Riley develops a crush on a British guy, but Bonnie mistakenly thinks she's fallen for Danny; and the gang's trip to a Renaissance faire goes badly.

Phillip may lose his visa thanks to Ben. Meanwhile, Danny dates a sports reporter; and Tucker adopts a phony British accent to impress women.

Tucker's new girlfriend used to date Ben but doesn't seem to remember. Riley is invited to a spa day with her boss.

Bonnie sets Ben up on a date with an energetic gal who's similar to herself. Elsewhere, Danny gets his dad's cherished car out of storage, but problems arise when Riley and Tucker take it for a spin.

Riley starts a new romance. Meanwhile, Bonnie wants to rekindle things with Brad, so she asks for Tucker's assistance.

Ben takes Bonnie to see Bon Jovi to thank her for everything she does for him and Emma.

Riley tries to figure out who her biological father is and comes up with two candidates. Elsewhere, Tucker blames his dad for his parents' impending divorce, so Bonnie attempts to help by getting Tucker's father to be less rigid.

Riley is looking forward to meeting Philip’s sister from England, but her excitement soon vanishes when it becomes obvious that Georgie is less than impressed by her brother’s taste in girlfriends. Danny’s contract negotiations are in jeopardy when Bonnie tangles with the Rangers’ new general manager, Valerie.

Ben, Danny, and Riley take stock of their lives when they review their fifth-grade time capsules.

When Ben misses out on seeing Emma's first steps, the rest of the gang try to recreate the moment for him.