Three Dog

Three Dog is the radio host, DJ, and news anchor of the Galaxy News Radio station in the Capital Wasteland in 2277, playing music that would have been heard on the radio in the years leading up to WWII, as well as the immediate post-war era.

Background
Born to parents who made their way in the world as members of a traveling theater group, Three Dog grew up listening to rock music, resenting the government that he never knew (but surely caused the Great War), and fully believing in the rights of free speech and communal law. He is fully committed to "spreading the signal" of his radio station to anyone who will listen; it is his duty to counter the propaganda spouted by the Enclave on their station.

At some point before he established GNR, he was taking Jet and stumbled across Oasis. He established GNR in 2272, together with Margaret. Since he began, he has been broadcasting to the Wasteland with public service announcements and music. At times he makes jests at Enclave Radio, going as far as mocking President John Henry Eden's voice.

Three-Dog believes in what he calls "fighting the Good Fight," which boils down to any action that opposes and antagonizes the Wasteland's various oppressors and thugs, be it raiders, super mutants, slavers, Talon Company, or the Enclave. To this end, he actively cooperates with the Brotherhood of Steel, letting them use his fortified radio bunker as an outpost. However, he does not do any physical fighting, nor does he help to coordinate or organize it. Three-Dog has been mentioned by Travis Miles, DJ for Diamond City Radio. After the Sole Survivor defeats the Institute with the help of either the Minutemen or the Railroad, Travis will say that an old friend used to tell him "you have to fight the Good Fight".

Daily schedule
He stays in the GNR building throughout the entire game.

Quests

 * Following in His Footsteps: Passing a Speech challenge will give immediate information about the Lone Wanderer's father.
 * Galaxy News Radio: Failing, or not taking the aforementioned challenge starts this side quest. If the Lone Wanderer passes that check, they can immediately reinstate conversation to have both quests running at the same time. The Wanderer can also come back later, or see him for the very first time after having made progress otherwise in the main quest to find father James, and if the Wanderer can bring support to Three Dog's "good fight," Three Dog will also give the Lone Wanderer this quest.
 * Should Three Dog die before he tells the Lone Wanderer to go to Rivet City at the end of the quest "Galaxy News Radio" starts the quest The Search Continues.

Effects of player's actions

 * Three Dog will comment on various actions of the Lone Wanderer through his radio broadcasts.
 * On Galaxy News Radio, Three Dog will constantly refer to the Lone Wanderer by their current Karma title or 101.

Appearances
Three Dog appears in Fallout 3, Fallout Shelter, and is mentioned by Travis Miles, as well as Robert MacCready in Fallout 4

Behind the scenes

 * The name of the character Three Dog is shared by a character played by his voice actor (Erik Dellums) "Dog 3" in the film She's Gotta Have It.
 * Erik Dellums helped develop the character, including his signature howls.

Bugs

 * Occasionally, Three Dog will mention events that occur after the ending of the game. He will only do so if the player had downloaded the Broken Steel downloadable content and has not played through the part in the game before it.
 * Sometimes after starting a new game, Three Dog can be heard stating things that haven't come to pass yet. This has been known to last until you catch up with the event that he's referring to.
 * Sometimes Three Dog will start saying a comment and then quickly switch comments about the player over and over again. This can prevent you from listening to music for the rest of the game.
 * Occasionally Three Dog will repeat the "News" section of the broadcast 2-3 times over until he later continues playing songs again.