Dan Patterson (born March 1960) is a British television producer and writer, responsible for the production of both the British and American incarnations of the improvisation show Whose Line Is It Anyway? and the British satirical panel show Mock the Week with writing partner Mark Leveson. He has also written for episodes of both shows. He co-created Whose Line Is It Anyway? alongside Mark Leveson, initially on BBC radio before moving with it to Channel 4, and then onward to ABC. In 2004, he established Angst Productions, which is responsible for Mock the Week.