Caylus: On the set of “Galaxy Quest” (1999), Alan Rickman arrived with notebooks filled with phrases written in bold, carefully underlined ink. Each note was a study in tone, rhythm, and vocal exaggeration, drawn from his years of Shakespearean training. He knew Dr. Lazarus, the fictional alien commander cursed with an endlessly repeated catchphrase, could easily collapse into caricature. To prevent that, Rickman approached the role with the same precision he once gave to “Hamlet” and “Macbeth,” blending satire with sincerity until his performance held both comedy and pain. (continued)