Two (The Ark)

Two was the second-in command of the Monoids, in and after their revolution against the Humans on the Ark.

Biography
Two's name was based on rank, he was second only to One. His communicator had the number 2 embroiled on it, an indication of this rank. Two scouted Refusis II ahead of the main Monoid party. A Refusian used force to prevent him breaking objects in a rage.

Two reported back to the Ark and was about to tell them about the Refusians when a Refusian killed him by having his landing craft explode. (DW: The Ark)

Behind the scenes

 * Of the Monoid actors (Edmund Coulter, Frank George, Ralph Carrigan, John Caesar), it is never made clear who played which Monoid.