Doctor Who: Short Trips Monthly is a series of new short stories read by an original cast member. Release #7 is a Seventh Doctor and Ace story. Materialising aboard the submarine HMS Thunder during the Second World War, the Doctor and Ace join Commander Fitzgerald and his crew as they track a fellow sub in trouble. While the Doctor advises the Captain on navigational matters, Ace joins in a daring mission to rescue sailors in the water. With German planes overhead, no-one’s survival is guaranteed…