John O'Brien is an actor who played Kato-Re in the Farscape episode "Jeremiah Crichton."
Some of O'Brien's other television credits include a stint on the soap opera The Young Doctors, a recurring role on Mako Mermaids, and guest spots on A Country Practice, Prisoner, Mission: Impossible, and Sea Patrol. His films include Aya (with Chris Haywood) and the TV movie Airtight (with Marshall Napier).