Neil Patrick Harris and the entire SNL cast perform the theme to Doogie Howser, M.D.. Harris wears a tuxedo while everyone else is dressed as Doogie Howser in blonde wigs, lab coats with a picture ID of Doogie on them, dress shirts, colorful ties, acid washed jeans, and Nike hi-tops (Armisen and Samberg wear green sunglasses as well). Harris plays keyboard; Wilson, Elliott, and Michaela Watkins play violin; Moynihan plays tuba; Thompson plays harp; Hader plays saxophone; Hammond plays trumpet; Wiig plays electric guitar; Sudeikis plays double bass; Forte plays drum kit; Armisen plays synthesizer; and Samberg plays an Akai MPC 2000XL drum machine. At the end of the performance, Harris sheds a single tear. (thetvdb.com)