Roger Sayer never anticipated that his organ playing would be heard by millions as part of the soundtrack to a blockbuster sci-fi film, but that's exactly what happened after composer Hans Zimmer decided to record the epic score to 2014's Interstellar on the organ at London's Temple Church.

Sayer is the organist and Director of Music at Temple Church, and he joins us here for an interview about how he became an organist, what it was like to record for a blockbuster film score and why the organ is the perfect instrument for a film about time, love and outer space.