It is March 1941 and Clydebank has been bombed. Has someone been passing information to the Germans? The clocktower at Singer's Sewing Machine Factory has been struck! Almost no houses are left standing! What have the McGinty's to do with this... if anything... and... as for Agent Garbo, is he really MI5?

Watch the drama unfold, study the evidence, scrutinise the witness statements , and tell us, who is the Spy? Why? How do you know? Prize to be won, so be competitive!