Walden is hired by a former employee he fired to write code for a new project, and Alan suffers an unfortunate tick bite while hiking with Jenny and her girlfriend.
Alan lets Lyndsey's boyfriend Larry set him up on a date, while Walden offers to help Nicole with her software project, so that she will have the time to date him.
After Alan learns that Lyndsey broke up with Larry and didn't tell him, he makes a big decision. Meanwhile, Walden sets out to prove that he's a man's man.
Just as Walden is considering proposing to Kate, he falls for a random stranger who arrives at his beach house. Meanwhile, Gretchen discovers that Alan's "Jeff Strongman" persona is a lie.
Walden's therapist tells him to have plenty of random casual sex to help get over falling in love too quickly, and Alan's new business venture provides him with the perfect opportunity.
Walden goes to Colorado with Jenny and Barry after he finds his first car. Meanwhile, Alan loses Gretchen after he considers telling Larry the truth about "Jeff Strongman."