To supplement my other question, which actor has appeared in the most movie franchises/series?

Best I can find is Samuel L. Jackson who has appeared in 13 series. He's had major supporting roles in Star Wars, xXx, The Incredibles (sequel incoming) and the Marvel Cinematic Universe, plus minor roles in The Exorcist III, The Return of Superfly, Patriot Games (Jack Ryan), Jurassic Park, Die Hard with a Vengeance, Shaft, Astro Boy, RoboCop and Kingsman: The Secret Service.