When it comes to making B-movies, Roger Corman always delivers an A+. Since his first production in 1954, the legendary filmmaker has made somewhere in the ballpark of 380 low-budget horror and action movies; along the way he became a mentor to Oscar-winning directors (like Francis Ford Coppola, Martin Scorsese and James Cameron) and gave big-name actors (Robert De Niro, William Shatner) their first break.