Commando Comic #4733 'Danger On Board' (2014)
 
HMS Apollo was one of many Royal Navy destroyers which escorted vulnerable merchantmen as they steamed beyond the North Sea and across the dangerous waters off Northern Russia. Doubly dangerous, for the Germans seemed to know their every move, with an alarming number of ships being sunk by Kriegsmarine U-boats and destroyers.
 
Midshipman Johnny Clark began to wonder if the enemy had some kind of help in obtaining their information. Surely none of the Apollo's men could be a traitor…could they?