Incoming Resources
- Enemy at the door, a London Weekend Television Colour Production ; Granada Television ; executive producer, Tony Wharmby ; producer, Jonathan Alwyn ; writers, Michael Chapman, James Doran, John Kershaw, N.J. Crisp, John Brason, James Andrew Hall ; directors, Bill Bain, Jonathan Alwyn, Mike Vardy, Terence Williams, Martyn Friend, Series 2