Walden gets a new toy, but soon finds his future at Nicole's startup may be limited. Meanwhile, Alan can't stay away from Lyndsey and Larry and begins dating Larry's sister.
Alan proposes to Lyndsey but ends up engaged to Judith. Meanwhile Jenny is afraid Brooke is breaking up with her.
Walden and Alan throw a bachelor party for Marty once he proposes to Evelyn.
Alan spends time with Lyndsey’s boyfriend in hopes of discovery why Lyndsey likes him so much. Walden encourages Jenny to take her acting career more seriously.