“Making of the Season 2 Finale” is a behind-the-scenes look at the making of this celebrated “chapter” of “The Mandalorian,” with a focus on the technology used for recreating Luke Skywalker. It delves into the collaborative process, including working with Mark Hamill, to create an authentic and fitting recreation, and explores the immense pressure and responsibility the filmmakers had in bringing back one of the most important characters in film history.