The likable odd-couple crime series McDonald & Dodds (ITV) is back for a second run. For audiences watching the old-fashioned way, as it is broadcast on television, it could not stand as more of a contrast to BBC One’s Bloodlands, its main opponent in the schedules. This is British crime drama with a cartoonish glow and it is practically allergic to bleakness. “I never go anywhere without my latex gloves,” says DS Dodds, played by Jason Watkins....