Alexander Toombs is the tertiary antagonist in the film, he is a mercenary who wanted to catch Riddick after a short encounter with him on the mercenary ship in Dark Fury. Nothing is really known about his past. His personality is humorous, yet obsessive and cold-hearted.
Initially he hired a newbie bounty hunter to find him in Hunt for Riddick, a point and click game in which the player is a mercenary searching for Riddick.
He soon led a four-man crew to capture Riddick on U.V.6 but failed. His ship was stolen, and he was left for dead on the surface of the icy planet. While Riddick was running from the Necromongers, Toombs's new crew destroyed the ship following Riddick and captured him soon after. It is unknown how he escaped U.V.6, or how he gained a new five-man crew.
He then took Riddick to the Crematoria prison. Unsatisfied with the price the guards wanted to pay for bringing him in, he negotiated with the guards. He gave them one day to change their minds. It ended up in a gunfight between the guards and the mercenaries, for the mercenaries had unknowingly led the Necromongers to their planet. Riddick used this gunfight to escape, and trapped Toombs in a cage between two Hell Hounds. His fate is unknown after he yelled "RIDDICK" as Two Hell Hounds try to munch him up.
- Toombs was first meant to die on screen, but the scene was deleted, and his imprisonment was shot to replace it.