"Chuck Versus the Goodbye," as well as the hour preceding it, are full of nostalgia for Sarah and Chuck. Seeing Sarah back in her hot dog serving outfit, or the pair dancing heatedly, or diffusing a bomb with Casey (Adam Baldwin), is a wonderful treat, paying homage to the early days of Chuck, sometimes very obviously. With everything dark going on, this lightens the mood. It also helps viewers overlook the numerous flaws, as they are so moved by what is playing out on screen, that they forget about logic. A smart move here.
Sarah and Chuck aren't the only ones who get the happy ending, either. Casey, after a brief slip back to the detached military officer he once was, chooses heart instead, and goes after Gertrude (Carrie-Anne Moss). Morgan and Alex (Mekenna Melvin) decide to move in together. Ellie (Sarah Lancaster) and Awesome (Ryan McPartlin) take promising jobs in Chicago, which will allow them to afford a big house, something they cannot do in L.A., even with their doctor salaries. Even Mary (Linda Hamilton) stops in for a visit, and General Beckman (Bonita Friedericy) gets to play a small role in the final mission (the final final final mission, long after the characters' stated final mission). So all the major characters are served.
Big Mike (Mark Christopher Lawrence) is thrilled to see Subway purchase the Buy More, or rather, excited by the prospect of the delicious food that will go with it. Subway has done much to keep Chuck on the air for all of these years, so despite some blatant product placement, which actually goes well with the hip charm of Chuck, and the confusion as to why a restaurant chain would want to purchase an electronic store, it can be overlooked. Subway deserves a reward for its staunch support of the show, and saluting it in the end is well justified.
Jeffster makes a final appearance in "Chuck Versus the Goodbye" as the duo (Scott Krinsky and Vik Sahay) performs "Take On Me," with orchestral backup, to stop a bomb from going off and killing Beckman and the audience. Their musical numbers have been an integral part of Chuck, and present for many important moments. Thus, it's fitting to see them one last time. Even better, the two are offered a recording deal in Germany, and complete their maturation that's been building in this fifth season. finally leaving the Buy More and heading on to bigger things.