On the Set Farewell to Chuck, Part 1: Jet Planes and A Jeffster! Swan Song
The finale is very much haunted by seasons past. This is an episode that's not only a finale for Season 5, but also five seasons of television," series co-creator Chris Fedak told reporters on the final set visit in December. "So we're going to be bringing back a lot of things that it wouldn't be an episode unless we saw Yvonne [Strahovski] in the cat suit, also wearing an evening gown dancing the tango."