Vosh

From Tardis Wiki, the free Doctor Who reference

Vosh was a trumpet player in an orchestra on the asteroid of Stanalan. His friend Harby and he helped the Eleventh Doctor, Amy, Rory and Perpetual Pete to stop the Drexxon from releasing his own kind.

He played in the orchestra at the end. This resealed the Perpetuity Chamber, trapping the Drexxon again. (PROSE: Death Riders)