Roger Anthony Lemke (born October 7, 1970) is a Canadian television and film actor, best known for portraying Three (Marcus Boone / Titch) on the science-fiction drama Dark Matter.

[4] Lemke landed his first professional role in a production of the play Nurse Jane Goes to Hawaii[5] by the Canadian playwright Allan Stratton at what is now the King's Wharf Theatre.

[6] In 2000 Lemke landed the role of the mustachio-twirling mercenary Captain Grisham on the fantasy-genre series The Queen of Swords, which Variety Magazine declared a "guilty pleasure".

[7] In 2003 Lemke enrolled in law school at the McGill University in Montreal, during which time he continued to act, including regular roles on the Montreal-shot series 15/Love (season 3) and CBC Television's Rumours.

[8] He followed up in French with recurring roles on Mémoires Vives, Mirador, Nouvelle Adresse, all of which are Gémeaux Award nominated TV series.

[13] Lemke also began a 7-episode run over two seasons on Bravo's police drama 19-2 as SQ Officer Dan Malloy.