Actually, I want crossovers between all the quirky detective stories.
Father Brown and Scooby Doo: Four teenagers and their talking dog start to believe a ghost is haunting the castle, until a short Roman Catholic priest reveals the misguided criminal under the mask and unveils a profound moral truth.
Peter Wimsey and Superman: Bespectacled ad man Death Bredon and bespectacled crime reporter Clark Kent work together to solve a mystery while trying to conceal their secret identities from each other.
Peter Wimsey and Batman: Clash of the Crime-Fighting Millionaires and their Battle Butlers.
Peter Wimsey and Psych: Sham American spiritualist Shawn Spencer makes himself at home in Wimsey’s flat and proves surprisingly adept at crime-solving.
Father Brown and White Collar: FLAMBEAU MEETS NEIL! I have no idea what else happens, but I just thought of it now and I NEED IT LIKE AIR!!
B-plot for #2 – Lois Lane interviews Harriet Vane about her latest crime novel, and they unexpectedly hit it off. Harriet ends up working with Lois on the same mystery as the boys, and together they turn up the crucial piece of evidence for the denouement.
Peter Wimsey and Lewis: Peter and Hathaway spend the entire time trading arcane Latin jokes and puns from metaphysical poetry.