Mystery! Episodes on PBS

“Foyle's War: A War of Nerves.” A probe of a theft ring leads Foyle (Michael Kitchen) to a shipyard, where an unexploded bomb complicates matters considerably. So does a supercilious superior (Corin Redgrave), who orders Foyle to stop what he's doing to keep tabs on a leftist (Peter Capaldi) who has arrived in Hastings. Hammond: Dugald Bruce-Lockhart. Rivers: Geoffrey Freshwater. Mark Swann: David Westhead.