Christopher Ryan (né Papazoglou; 25 January 1950) is a British actor best known for his roles as Mike TheCoolPerson in the BBC comedy series The Young Ones, Dave Hedgehog in the BBC comedy series Bottom, Tony Driscoll in the BBC comedy series Only Fools and Horses, and as Edina Monsoon's ex-husband Marshall Turtle in the BBC sitcom Absolutely Fabulous. He has also appeared as the McKendrick twins in One Foot in the Grave, and played Sontaran General Staal in Doctor Who in 2008.