London Spy BBC2, 9pm
New series. MI6 agent Alex starts a relationship with ordinary guy Danny and the romance promises happiness for both of them, but tragedy strikes when the spy dies in suspicious circumstances, forcing his lover to pursue the dangerous truth behind his death. Out of his depth in the world of espionage, Danny seeks help from his wise mentor Scottie, embarking on a journey where no one is who they seem. Tom Rob Smith’s thriller, starring Ben Whishaw, Edward Holcroft, Jim Broadbent, Samantha Spiro, Zrinka Cvitesic and Richard Cunningham.