The Shrine Auditorium's spotlight found Kristen Bell, elegant in white, to open the SAG Awards stage. She spoke of the actor's journey, its weight and its light, before a tribute to first responders, met with applause polite. Then, a shift in tone, a melody took flight, a familiar tune reframed for the night. "Do you want to be an actor?" her voice began to ring, over a montage of nominees'...