In the episode "The Fix", Hutch becomes forcibly addicted to heroin after gangsters kidnap him. David Soul prepared for the episode by depriving himself of sleep, food, and even bathing and isolated himself from the cast and crew. It got to the point where they began to genuinely worry about his mental health.
In the episode "A Coffin for Starsky", Starsky and Hutch are racing against the clock to find a criminal that injected Starsky with a deadly poison that's slowly killing him. In one scene Starsky collapses in a fit of pain. While this was scripted, Paul intentionally fell earlier than what was rehearsed, and Hutch's shocked reaction is genuine.
Germans Love David Hasselhoff: An iconic series in both France and Germany, and arguably even more successful in Britain than at home (David Soul just about lives in the UK now).
The Pete Best: In the pilot, Captain Dobey was played by Richard Ward; the role was then recast with Bernie Hamilton.
Actor Allusion: Starsky causes a Mexican Standoff in Huggy's bar when he accidentally shoots the tail off of his pet iguana Corky. Oddly enough, this isn't the only movie where shooting an animal called "Corky" gets Ben Stiller in trouble. Envy (released the same year as this film) had Stiller's character accidentally killing a horse named Corky (owned by Jack Black's character) with a bow and arrow, kicking off two hours of hijinks.