Lyndsey stuns Alan by breaking up with him, feeling that their relationship is not going anywhere despite their engagement. Although he is initially devastated, Alan is cheerfully in denial the next morning and explains to a dubious Walden that he and Lyndsey are still together because they "break up" all the time and get back together when Alan apologizes for his foibles. However, when he goes to get her back, he is outraged to learn that Lyndsey has begun dating a man named Nick. Alan injures his wrist and foot when lashing out upon hearing this news. Later, he heads out in his car to spy on Lyndsey and Nick (Walden tries to stop him, but a cheerful Herb joins Alan in surveilling Lyndsey). Alan then tries to spot Lindsey and Nick from a tree, but he falls out of the tree and badly injure