Magnum P.I. is free to watch on The Roku Channel. You can also buy it digitally.
Watch free on The Roku Channel
Free with ads, no subscription
Thomas Magnum, a decorated former Navy SEAL, returns home from Afghanistan and applies his military skills to become a private investigator in Hawaii taking jobs no one else will—with the help of fellow vets T.C. Calvin and Rick Wright, and former MI:6 agent, Juliet Higgins.