by Mark B Oliver
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…
Sophie Aldred (Narrator)
Directed by Lisa Bowerman
*Featuring the Seventh Doctor and Ace
*A Big Finish Audio Production