If you like a bit of spookiness, occult, ancient evil and mysterious government departments mashed up into a sort of true crime podcast thing .... then series 4 of "The Lovecraft* Investigations" is now on BBC Sounds R4.
New listeners might want to start at Series 1, of course.
* Footnote: That's H. P. Lovecraft by the way (not the slightly iffy shop at the insalubrious end of the high street).