The Adventures of Herbert “Daring” Dashwood is an episodic radio drama that appears in the post-apocalyptic video game Fallout 3. In the game, the player can tune into Galaxy News Radio and occasionally hear episodes of The Adventures of Herbert “Daring” Dashwood and his Ghoul Manservant Argyle, which is in the style of old time radio shows.
There is no official link to listen to the episodes outside of the game. This YouTube playlist contains all four episodes which have been produced as an animated series, plus in-game footage of locations within the game relevant to the radio drama.