Magnum P.I.
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.
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Based on audience scoresWhere to stream Magnum P.I.
Streaming now in the United States on The Roku Channel.
Rent or buy in the United States on Amazon Video, Apple TV Store, Google Play Movies, and Fandango At Home.
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First Look At Magnum P.I. on CBS
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Frequently asked questions about Magnum P.I.
Where can I watch Magnum P.I. in the United States?
Magnum P.I. is available to stream on The Roku Channel in the United States, and to rent or buy on Amazon Video, Apple TV Store, Google Play Movies, and Fandango At Home. Streaming availability is provided by JustWatch and can change over time.
Can I watch Magnum P.I. for free?
Magnum P.I. streams free with ads in the United States on The Roku Channel. A subscription is not required, though the service may ask you to register.
What are the ratings for Magnum P.I.?
Magnum P.I. scores 7.6 on The Movie Database.
Who stars in Magnum P.I.?
Magnum P.I. stars Jay Hernandez, Perdita Weeks, Zachary Knighton, Stephen Hill, and Tim Kang. Peter M. Lenkov is the creator and Eric Guggenheim is the creator.
How many seasons of Magnum P.I. are there?
Magnum P.I. has 5 seasons and 96 episodes, and is canceled.
What network is Magnum P.I. on?
Magnum P.I. airs on NBC and CBS, and is produced by Universal Television, CBS Studios, and Perfect Storm Entertainment.
Ratings and streaming availability are aggregated from third-party sources; metadata from The Movie Database (TMDB), streaming data from JustWatch. This product uses the TMDB API but is not endorsed or certified by TMDB. Streaming availability checked September 2026.