The BBC did full-cast radio plays of every single Sherlock Holmes with Clive Merrison, and they're ace. Their Sexton Blake is really good too. If you can get hold of it, the 90s American Werewolf in London that they produced was bloody brilliant.
Belloq
Toht
Dietrich
Gobler
That big sherpa that looks like Pat Roach
That big bald mechanic that looks like Pat Roach
That one-eyed agent on a motorbike that works for the Nazis
His pet monkey
The Afrika Korps sergeant from the back of the truck who chucks Indy through the windscreen
The Flying wing pilot