His first TV writing job was for "Spitting Image" and he went on to become one of the main writers. He has also appeared as a guest on "They Think It's All Over", "QI", and BBC Radio 5 Live's "Fighting Talk". Parsons left "Mock the Week" in October 2015 after nine series as a regular panelist, missing only five episodes. He, like the other regular panellists on "Mock the Week", kept the same seat throughout the series, Parsons being the one on host Dara Ó Briain's left.