On Lovecraft, I remember my first "Lovecraft episode" was a Ghostbusters episode where a portal to another dimension (with a demon head saying "Do not open until doomsday." repeatedly) was inside the New York City subway system. The 90s, though, were the golden age of Lovecraft in children's shows. Most of the time, however, these were BLAMs. (No foreshadowing, no subsequent mention of it.) ReBoot was the first one I saw that actually wasn't. But of course, with hackers personifying the Internet as Shub-Internet, Beastof a Thousand Processes, Eater of Characters, Avatar of Line Noise, and Imp of Call Waiting;what did you expect? My cousin showed me an episode of Digimon with the Digi-Deep Ones worshipping a Cthulhu-like entity in a world of black and white. (Later, he explained, a group of devil digimon try to enter that world.) Chrono Trigger had a truly Lovecraftian villain, however: Lavos simply lives off the planet's vital energies, awakening when the stars are right to go to another planet (and destroying most of the life on the planet in the process). Lavos wouldn't even notice humans, if they didn't try to wake him up so often. (Happens once in 12,000 BC and once in AD 600.)
And right now, the Star Wars Expanded Universe is doing Abeloth, who is sort of the kind of thing Derleth would write: Like Cthulhu, but without the "alien-ness" that makes Cthulhu Cthulhu. (She's lived in a black hole cluster for thousands of years, but the Jedi destroying this ancient space station halfway across the galaxy woke her up. It just happens Luke kept his youngest students in that black hole cluster for safe keeping, so now they're all going nuts. And yes, there is a tentacle motif. She also for some reason tries to romance Luke twice.)
So yes, Lovecraft has the same sort of fame in children's series that Steinbeck ("I'm going to love him and pet him and squeeze him and call him George.") did in the Warner Bros. era of cartoons.
Oddly, television has been kinder to Lovecraft than the movies. (Though this is perhaps prophetic; HPL hated Hollywood. He once described how, upon seeing Frankenstein, he would've gone to sleep, if his sympathy for Mary Shelley didn't fill him with rage.) In movies, I think of The Dunwich Horror. A new female protagonist is added just for Hollywood's obsession with romance, and Wilbur Whateley is handsome. (In the short story, he's a hulking brute who looks fully mature by age 10 and keeps growing.) Also, we have these white men playing island natives who apparently want to rape the girl. Or something.
On purgatory, in catechism, purgatory is a stopping place before going to heaven. It's where you're "purged" of your sins.