The episode Bad Blood first screened in the UK at 21:00 GMT on 22nd January 2006 is set in August 1942. There is a scene where a bottle of Streptomycin is given to Foyle to take to the local hospital to administer to assist the recovery of his driver Sam from Anthrax infection. Streptomycin was not isolated until 1943 by American biochemists Selman Waksman, Albert Schatz, and Elizabeth Bugie and wasn't even trialled on humans until 1944.