You really need to watch Foyle’s War too. It actually uses some real back stories from the War to good effect. The tragic disaster on a Cornwall beach involving US troops, the storage of hundreds of pictures from the National Gallery in an underground bunker in Wales are just two. And then it becomes hard to separate fact from fiction later on with SOE and so on.
Lewis too has some great story lines surrounding events in Oxford, like the Inklings. Love Morse, Lewis and Endeavour in different ways. The nods to Morse (in Endeavour) are just incredibly poignant. And they do such a good job of referencing characters from years later, all thanks to Colin Dexter having such an integral part in it. The only problem being DI Thursday, in that he’s one character never mentioned in Morse. So how is that to be reconciled, if at all? I dread some deeply tragic event to explain how Morse apparently never refers to him in his later career.
Edit: at this point I should mention I haven’t actually seen the most recent 4 episodes of Endeavour. So no spoilers please!