Milner mentions the abolition of private petrol rationing, a law which came into effect on 1 July 1942. Mention is made by Leonard Cartwright of Convoy PQ 17 and of the sinking of the Christopher Newport and Navarino which happened on the 4–5 July 1942. Simon Higgins (the blinded scientist on the bed) refers to The London School of Hygiene &amp; Tropical Medicine, and Foyle is given streptomycin to treat Stewart - although in error as streptomycin was not discovered until 1943. Filmed: April–May 2005