Agatha Christie's Partners in Crime

N Or M? Part 3

Tommy finds the missing scientist, but both are held captive, and the agent's identity is still unknown. Luckily, the scientist hid an important key to the bomb before his capture. Tuppence comes to the rescue, and together she and Tommy attempt to retrieve the key, but danger lies in wait. The Beresfords turn to Carter for help in devising a risky plan to save thousands of innocent lives.