Max Tresilian

Max Tresilian was a human who joined Pilgrim and befriended Suzie Costello. He served as he unknowing Trojan Horse to be used as part of her plan to bring herself back to life if she needed to kill herself and suck the lifeforce out of another person to come back.

Biography
Once a week for two years, Suzie would reveal to Max her secret about working at Torchwood 3 and then wipe his memory with Retcon. Ingesting these large amounts of Retcon eventually drove Max insane and she re-modelled his mind around certain poems by her favorite poet, Emily Dickinson. After Suzie shot herself, Max began killing people and was captured in a bar by Torchwood. He was then taken to the Vaults, where Torchwood discovered their name drove him insane.

As Suzie made her escape with unwitting accomplice Gwen Cooper, Max began manically repeating the Dickinson poem "Because I Could Not Stop For Death"; this, coupled with a back door program Suzie installed in the Torchwood computers, put the Hub into lockdown, trapping Jack Harkness, Toshiko Sato, Owen Harper, and Ianto Jones. With phone assistance from Cardiff Police, Jack and Tosh unlocked the Hub using the ISBN on Dickinson's poetry anthology. It is not known what became of Max after this. (TW: They Keep Killing Suzie)