Three months have passed since the finale, and Ben is still enthusiastically searching for the mysterious Elle. Danny and Riley are hunting for a good doctor to help with the pregnancy and Bonnie desperately wants to be involved. Tucker is back from Los Angeles, but he refuses to tell anyone what happened when he was there.
Ben learns some interesting facts about Tucker's recent date but questions whether or not Tucker is actually going out with a hooker, so he enlists Danny's help in finding out the truth. As Bonnie and Brad are preparing to set off on their trip around the world, Brad is arrested by the FBI. Riley agrees to defend Brad as his lawyer, but it turns out to be more complicated than anticipated.
Ben believes he has found the perfect no-strings-attached hookup partner, although Riley tries to convince him that emotions always become involved; Danny winds up competing against an old friend who is a professional wrestler.
Tucker is nominated for a prestigious television award, prompting his mom to surprise him as his guest to the ceremony, which throws a wrench in Tucker's plan to have Bonnie pose as his mom. Meanwhile, Riley's pregnancy begins to show, leading her to worry if this will hold her back from being promoted to junior partner.
Sam returns in hopes of giving her relationship with Ben another chance, but Ben hesitates because he's still searching for the mysterious Elle. Elsewhere, Danny and Tucker volunteer for a charity ice-skating show that features Emma's favorite princess; and Riley practices parenting.
Danny is being overprotective of pregnant Riley, so Ben surprises Riley with a day off and a hike in the woods to get some time of freedom. Worried that Ben is too irresponsible, Danny sneaks after them only to learn that Riley is just as scared of becoming a parent as he is. Bonnie learns that her boss may be the reason Brad is in jail, so she schemes with Tucker to gather evidence and set Brad free.
Ben is jealous when he learns that Bonnie is sending Danny on a cruise to celebrate becoming a dad, so he and Danny hold a "Wheeler War" to see who deserves the trip more. Meanwhile, Tucker and Riley run into Tucker's ex-girlfriend at a Lamaze class, where he fibs about where he's at in life to impress her.
Ben meets a runaway bride who is convinced that fate has thrown them together. Meanwhile, Danny and Riley go on their babymoon cruise, but Bonnie decides to tag along after Danny reveals he hopes that he and Riley will elope.
Tucker learns that his ex-girlfriend is newly single, so he and Ben hatch a plan to win her back. Meanwhile, Bonnie and Riley bond while camping out in a department store to score a sale on a crib; and Danny tries to babyproof his and Riley's apartment.
Danny and Ben are eager to find out the sex of Riley and Danny's baby, even though Riley would prefer it to be a surprise. Meanwhile, Riley fights for Brad's innocence in his final trial; and Tucker auditions to be in a new courtroom-reality series.
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.