Into the Darkness

144 Burning Stars, Version 3, Episode 5 - Call of Cthulhu RPG

200 Horror on the Orient Express, version 2, episode 63 - Call of Cthulhu RPG

Constantinople

312 Wings of Change, version 1 - Call of Cthulhu RPG

USA and Russia have a concert

144 Burning Stars, Version 3, Episode 4 - Call of Cthulhu RPG

Revelations

311 A Short Rest at the Sidewinder Saloon, version 1, episode 2 - Call of Cthulhu: Down Darker Trails

311 A Short Rest at the Sidewinder Saloon, version 1, episode 1 - Call of Cthulhu: Down Darker Trails

307 WWC: Captive Audience, version 1, episode 1

This is part of a campaign.
If you haven't listened to WWC: Midnight Sun, you should start there. 

310 I'm Nobody, Who are You? version 1 - Mothership

175 Hand of Glory, version 7 - Call of Cthulhu RPG

120 Saturnine Chalice, version 10 - Call of Cthulhu RPG