​Thomas Christopher "Chris" Parnell (born February 5, 1967) is an American comic actor best known as a cast member on Saturday Night Live from 1998–2006 and currently for his recurring role as Dr. Leo Spaceman on NBC's Emmy Award-winning comedy series 30 Rock. Parnell is currently one of the lead voices on the FX animated comedy Archer. In 2010, Parnell starred alongside his former SNL castmate Horatio Sanz in the Comedy Central series Big Lake.