The Magnus Beam

A mysterious weapon is destroying American U2s. The Seaview's mission is to find the weapon and destroy it. Captain Crane goes undercover. A night-club performer, who is also a resistance fighter, comes to Crane's aid. The Captain is soon captured and severely beaten. Meanwhile, on Seaview, Major Amadi demands asylum. To prove his sincere intentions, he promises to lead the sub to the powerful magnetic weapon responsible for taking out those U2s. Nelson suspects he wants to lead Seaview to a watery grave.

En el Oriente Medio se ha creado una máquina capaz de generar un rayo que, al atraer cualquier objeto metálico, de cualquier dimensión, puede destruir todas las armas convencionales. Antes de que el mismo Seaview sea atrapado por el rayo, el Capitán Crane se infiltra en territorio enemigo.