Ace Rimmer is an alternate version of Arnold Judas Rimmer from an alternate reality. In Ace's dimension, Ace Rimmer is a selfless, brave, flamboyant and likeable test pilot in the Space Corps and has the rank of commander. Bongo, Ace's superior officer, assigned Ace to test pilot a new space vehicle that can travel across dimensions and would allow Ace to meet many different versions of himself from those dimensions. Ace arrived in *our* dimension and accidentally collided into Starbug, causing it to crash on a watery planet. Ace came to the Red Dwarf crew's aid and met alternate versions of his friends in the Space Corps: Dave Lister (Spanners, Space Corps engineer), The Cat (Padre, a priest), Holly (Melly, Bongo's secretary) and Kryten (Bongo) and Arnold Judas Rimmer (himself), who had bitter feelings towards his alternate self. After successfully aiding Lister in repairing Starbug and surgically repairing Cat's damaged leg. Ace decided not to stay on "Red Dwarf" and continued his adventures across the dimensions and meeting other versions of himself. But tragedy later struck, when Ace was killed, when an neutron tank exploded in dimension 165 and since then, alternate versions of Ace have assumed the mantle of Ace, becoming a swashbuckling James Bond-like space hero. Many versions of Arnold Rimmer have become Ace, recruiting and passing the role onto the next. When the latest Ace's light bee was damaged by a gunshot, when rescuing Princess Bonjella from the Nazis, Ace returned to our dimension and arrived aboard Starbug to recruit and train our Rimmer and revealed to our Rimmer, that he is also a hard light hologram and Ace was dying from a power leakage, as the result of the damage from his light bee. After Lister dressed up as a knight, tricks Rimmer (As Ace) into fighting him to a duel and shooting him with blanks from a Bazookoid. A proud Ace soon died and Lister fooled Kryten and Cat into thinking their Rimmer had died and that their Rimmer was Ace. After Rimmer's funeral and following Ace's coffin to his final resting place, in orbit around a planet, which was also the final resting place of all the other Ace Rimmers. Rimmer left Starbug and begun his adventures as Ace. When Red Dwarf was slowly being disintegrated by a microbe, Ace came to the resurrected Arnold Rimmer's rescue and in return, Hologram Rimmer got the Ressurected Rimmer to take over as Ace and Rimmer rejoined the Red Dwarf crew.