When Mike is asked to be the best man at his friend Jimmy's second attempt at marrying Marcia, he is forced to remind the groom of their pact after she left him at the altar the first time. Although Mike is determined to keep his word, a heart-to-heart talk with Marcia gets him to change his mind. But when Mike runs into his ex-girlfriend Shawna at the wedding, he is forced to confront his feelings for her and makes an attempt at reconciliation. (NBC)