Telltale Games have announced that the season finale of Tales from the Borderlands, The Vault of the Traveler, will be released on October 20th for PlayStation 3 and 4, Mac, and PC.
Xbox owners can download the game on October 21st whilst mobile gamers on iOS and Android will get the episode a day later on October 22nd.
They have also announced that episode one, Zer0 Sum, is now free on both consoles and mobile. A quick check on the PlayStation store reveals the PS3 version is indeed free, but the PlayStation 4 version is not. It might be worth checking back a little later to see if that has changed.