Foyle's War...Unaired Episode with Cockroaches

I think our current all-rain all-the-time situation, which is increasing the incidents of encountering my mortal foe, the cockroach, is getting into my head---along with Foyle’s War, the Masterpiece Theater mystery series, which we’ve been devouring....I had this dream last night that we were watching Foyle's War, and the episode was about the search for a giant human-sized murdering cockroach. Except there were a lot of law-abiding giant cockroaches in England, so the case was difficult. At one point early on, Foyle decided he needed someone to go undercover in an apartment complex full of giant human-sized cockroaches.So Sam speaks up and says, “Oh, sir, I’d love to go undercover to help get this cockroach, if it’s all right with you, sir. I think I’d enjoy it, as a break from driving.” So Foyle reluctantly agrees to this, and Sam goes undercover.From there, the episode gets really strange. First of all, they keep cutting to Foyle’s sergeant, who has called in sick. But you see recurring shots of him, and he’s dressed in a black tuxedo and attached to the ceiling of his house, and just kind of hissing and there’s white stuff coming out of his mouth, that he’s affixing to the ceiling.Meanwhile, the scenes with Sam infiltrating the apartment complex are as if through the holes in her cockroach disguise that allow her to see out, so you just see a lot of confused, claustrophobic dark shots of exterior feelers and cockroach mandibles and terrible glossy bug eyes, along with this chittering that you gradually realize is Sam trying to speak cockroachese.If that’s not bad enough, Foyle spends the entire episode from then on in a chair by the fireplace of his home, and every once in a while he’ll move his head really fast to face the camera, and he gives this really fiendish smile, and we see a ghostly overlay of a cockroach head over his own head.So, finally, Sam gets in a lot of trouble, and they just manage to rescue her, but when she returns to Foyle’s place, he’s still in the corner just staring off into space, and we cut to the sergeant on the ceiling, who has kind of married the ceiling—like, he’s now kind of decomposing into it, or becoming something else entirely.We then cut to Sam on the white cliffs of Dover---no idea how she got there---and she’s staring out like she’s expecting to see something on the horizon, and she says “They weren’t really cockroaches, were they? They weren’t. They weren’t.” Then the next-to-final shot is a close-up of Foyle’s son flying through the air, but when the camera pans back, we see he’s not in a fighter plane but instead on the back of a giant flying cockroach, high above the white cliffs of Dover. Except, as we pan back in, we see that it’s the son’s *head* growing out of the back of the “cockroach”.The very *last* shot is of Foyle again, in his chair, except we realize it’s not really a chair. That it’s a kind of weird carapace. And he looks right into the camera and screams, “For England! For England! For England.”The end.