Coldwelder was a Cybertronian from the pre-Age of Wrath period who was examined by Ratchet and his assistant Crankhandle after claiming he had been abducted by aliens. Ratchet soon discovered that Coldwelder's claims were true: an alien device had been implanted inside his head. After calling in Cogwheel for a second opinion on him, Ratchet determined that he would have to convince Coldwelder not to speak further of his abduction experience. Sadly, Coldwelders abductors would soon arrive in force, as his injury was a prelude to the coming of the Quintessons to Cybertron.