Harby
From Tardis Wiki, the free Doctor Who reference
Harby played the violin in an orchestra on the asteroid of Stanalan. His friend Vosh and he helped the Eleventh Doctor, Amy, Rory and Perpetual Pete stop the Drexxon from opening the Perpetuity Chamber.
He played in the orchestra at the end. The correct notes helped to reseal the chamber. (PROSE: Death Riders)