When Kryten contracted the Armageddon Virus and started to work on an antidote, he hallucinated himself as the Sheriff in the wild west town of Existence. Sheriff Kryten was a drunkard, and spent a lot of his time in the Last Chance Saloon.
The saloon was a small, wooden structure with swing doors and a long bar. There were animal heads mounted on the wall and it was populated by a group of typical lowdown western gunslingers, drinking and playing poker.
Sheriff Kryten went in there for a drink, but was ridiculed by the patrons for being a drunk. One of the customers, Jimmy, tripped him and nearly started a gun battle before Kryten backed down. He then went to the bar and asked the barmaid, Miss Lola, for her "best sipping likker" (the smooth stuff, where you get your eyesight back after 2 days).
The Apocalypse Boys then arrived outside and demanded the sheriff present himself. After downing a few of the patron's leftover drinks and grabbing a bottle, Kryten went outside. The Boys demanded he leave town and shot the ground around him as motivation.
Lister, Cat and Rimmer were watching this on the screens aboard Starbug and decided to help. They used the AR console to join him as western characters. They found him in the saloon, trying to sell his possessions for whiskey. Jimmy tried to taunt Kryten with a whiskey bottle on the end of a whip, until Brett Riverboat (Lister) cut the whip and pinned Jimmy to the wall with his knife throwing.
Jimmy demanded vengeance, ordering his cronies Frank and Nuke to shoot Lister. The Riviera Kid (Cat) stepped forward and shot the bullets out of the air. As Kryten tried to flee the mayhem, the angry patrons turned on the Dwarfers, but Dangerous Dan McGrew (Rimmer) was able to beat them all aside.
After dragging Kryten back into the saloon, they forced him to eat a half dozen bowls of Lola's raw coffee until he was sober. His memory of the real world began to return and he was ready to face the Apocalypse Boys out in the street (RD: Gunmen of the Apocalypse).
The swinging doors to the Last Chance Saloon were the background and artwork to the Series VI DVD.