Christopher James Baker is an Australian actor, writer, and director born and raised in Australia, where he studied drama for three years in Sydney before beginning his career in theatre. He lived in the UK before returning home, then moved to the United States in 2009, where he initially featured in numerous Off-Broadway theatre roles before landing film and television work. He returned to Australia in 2020 and now splits his time between both countries.

His most notable television roles include Blake Churchman in True Detective (2015, 7 episodes, HBO), Boyd Langmore in Ozark (2017–2022, 8 episodes, Netflix), Henry King Sr. / Brainwave in Stargirl (2020–2021, 12 episodes, The CW), Chronicom Hunter Malachi in Agents of S.H.I.E.L.D. (2019, 6 episodes, ABC), Theo Bennett in Shades of Blue (2018, 7 episodes, NBC), Raymond Earl in Gotham (2014), and Ivan Kroll in Boy Swallows Universe (2024, 6 episodes, Netflix, with Simon Baker and Travis Fimmel). His film credits include Harmon James in The Purge: Election Year (2016), Monte in The Duel (2016, with Liam Hemsworth and Woody Harrelson), J.D. in Sanctum (2011, with Richard Armitage), Ensign in Nim's Island (2008, with Joanna Newsom and Christopher Plummer), Monty in The Great Raid (2005, with Ben Foster), Crumble in Kangaroo Jack (2003, with Joel Edgerton), and Doc in Unit 234 (2024).