Sheppard possesses a unique relationship with the Wraith "Todd." The two were initially held prisoner together by Acastus Koyla with Todd being forced to feed on Sheppard to torture him. Sheppard's unfailing belief that they could escape or be rescued convinced Todd to work with him to get out with the deal that if they ever met again "all bets are off." Both kept their ends of the deal: Todd restored the life he stole from Sheppard, something he stated was reserved only for their worshippers and "brothers" and Sheppard took him somewhere he could be found by the Wraith rather than killing him. Despite their deal, Sheppard later agreed to work with Todd on several occasions, even once saying that Todd may be their best chance at defeating the Wraith, but is very distrusting of him. However, Todd, even after betraying Sheppard once, kept coming back to him for help despite repeated death threats and the two seem to have a mutual understanding of each other. In one episode, Sheppard uses his understanding of Todd's personality to convince him to do what he wants. Todd realizes this and states to him "you know how to talk to me," but is amused rather than angry as Sheppard was right. Todd also seems to trust at least Sheppard's word as he has never seriously questioned him when they make a deal which Sheppard always upholds. When Sheppard did so once to the point that it saved Todd's life, the Wraith promised to remember his actions.