Captain’s log: stardate 3478.2 The Deadly Years soared onto screens on 8 December, 1967, with a script by David P. Harmon. Kirk (William Shatner), Spock (Leonard Nimoy), McCoy (DeForest Kelley), Scotty (James Doohan), Chekov (Walter Koenig) and Galway (Beverly Washburn) beam down to Gamma Hydra IV. Once there they discover that the entire outpost is…