One Happy Chappy in a Snappy Serape

Plot:

Rebecca is still in a quandary over what to do about the marriage proposal from Martin Teal. Martin, her boss, is a weaselly little twerp in her own words, but she doesn't want to jeopardize her career. She talks Sam into rekindling their fake relationship to the point of being in a fake engagement to throw Martin off her trail. Martin however makes a preemptive move by sending Sam down to Cancun on a bartender exchange for a month, Sam who is thrilled by this opportunity. While away, Sam thinks nothing about Cheers or Rebecca. When Sam misses the corporate jet back to Boston, Martin takes that as a sign that Sam has forgotten about Rebecca and his job in Boston, and once again hits on Rebecca. Rebecca manages to hold Martin off in the short term while she works on her supposed "grief". She heads down to Cancun herself to plead with Sam to come back, even to the point of threatening him at gunpoint. When Sam still won't go back to Boston, Rebecca leaves in total dejection. Back in Boston, Rebecca concedes to Martin by getting into a drunken stupor. Martin asks her to marry him once again and she accepts. He is well prepared and has Justice of the Peace with him for the ceremony right then and there. Just at that moment, Rebecca's knight in shining armor, Sam, comes bounding back into Cheers to save Rebecca from Martin. Luckily, Martin not only sees that Sam has "won" Rebecca, but he doesn't fire her from the corporation. After Martin leaves, Rebecca passes out. Unlike the several other such opportunities he has had with Rebecca, Sam finally takes advantage of her vulnerable situation: he draws a mustache on her.