Magnum P.I.: Season 4
2021 · 20 episodes · ★ 7.5
What Season 4 of Magnum P.I.
Thomas Magnum, a decorated former Navy SEAL, returns to Hawaii after his missions in Afghanistan and makes a living as a private investigator. He lives in the guest house at Robin's Nest, the estate of writer Robin Masters, in exchange for becoming the hero of her knight-errant novels. He's joined by Juliet Higgins, a former MI6 agent who runs the mansion, and his old Marine buddies Rick Wright and T.C. Calvin. Together they take on the cases others turn down: a mother hunted by assassins, the death of a laborer, or a caddie accused of stealing golf clubs. Higgins also receives MI6 assignments that force her to keep secrets from her partner.
Season 4 Episodes
4x01 Island Vibes
As Magnum tries to keep his new relationship a secret and handles cases solo while Higgins is away, he is tasked with finding a single mom being hunted by two very dangerous gangs. Also, while Higgins is abroad with Ethan, a misstep forces her to assist an old employer, and Rick gets some bad, but also very, very good news.
Directing: Bryan Spicer · Writing: Eric Guggenheim, Gene Hong · Starring: Jay Ali, Brenda Koo, Marsha Thomason, Betsy Phillips
4x02 The Harder They Fall
While Magnum and Higgins reunite and work the case of a construction worker’s tragic death, TC and Shammy get skyjacked by a pair of drug runners posing as tourists.
Directing: Doug Hannah · Writing: David Wolkove · Starring: Shinelle Azoroh, Tinpo Lee, Christopher Thornton, Chantal Thuy
4x03 Texas Wedge
Magnum, Higgins and Rick go undercover at a ritzy country club when a young caddie is fired after being accused of stealing a member’s golf clubs. Also, Jin’s niece, unaware of her uncle’s shady past, asks him to speak at her school.
Directing: Antonio Negret · Writing: Gene Hong · Starring: Kate Flannery, Marsha Thomason, Bobby Lee, Martin Martinez
4x04 Those We Leave Behind
Higgins’ therapist hires her to look into why one of her teenage patients died of suicide.
Directing: Allison Liddi-Brown · Writing: Barbie Kligman · Starring: Lance Lim, Martin Martinez, Chantal Thuy, Shawna Christensen
4x05 Til Death
When Magnum and Higgins are hired by an anxious groom to look into his bride-to-be on the eve of their wedding, what they think is a simple case of cold feet turns into a web of lies and a life-or-death situation for Higgins. Also, TC makes a touching decision on how to help Cade.
Directing: Eagle Egilsson · Writing: Katie Varney · Starring: Taiana Tully, Ian Harding, Molly Griggs, Martin Martinez
4x06 Devil on the Doorstep
A journalist hires Magnum to track down his anonymous source after they mysteriously go dark, and Higgins receives a new assignment from MI-6. Also, Rick’s old friend comes to the island, but TC is suspicious of his motives.
Directing: Claudia Yarmy · Writing: Tera Tolentino · Starring: Devon Sawa, Marsha Thomason, Yancey Arias, Christopher Thornton
4x07 A New Lease On Death
When Rick is asked to assist with a federal investigation of his childhood friend Robbie, Magnum launches his own investigation to see what the Feds really have on him Also, Kumu goes undercover in a retirement community when Higgins is hired to investigate the disappearance of a resident’s life savings.
Directing: Ruba Nadda · Writing: Barbie Kligman, Zachary Knighton · Starring: Devon Sawa, Yancey Arias, Chantal Thuy, Richard Gant
4x08 A Fire in the Ashes
Magnum starts following Higgins to discover what she’s been hiding, as she’s secretly assigned to infiltrate a group threatening to take down MI-6. Rick struggles after an explosion takes the life of someone important to him.
Directing: Lisa Robinson · Writing: David Slack · Starring: Marsha Thomason, Yancey Arias, Christopher Thornton, Chantal Thuy
4x09 Better Watch Out
A Christmas Eve ransomware attack on the Honolulu Police Department forces Lia to reveal a family secret to Magnum and Katsumoto.
Directing: Ruba Nadda · Writing: Katie Varney · Starring: Taiana Tully, Leonard Wu, Chase Kim, Christopher Rodriguez Marquette
4x10 Dream Lover
When a woman hires Magnum and Higgins to locate a man she met briefly at a coffee shop and felt a spark with, they learn that he is hiding a big secret. Also, Higgins keeps a secret of her own after she has a romantic dream about Magnum.
Directing: Avi Youabian · Writing: David Wolkove · Starring: Brooke Nevin, Logan Donovan, Josh Stamberg, Kelly Mumme
4x11 If I Should Die Before I Wake
A nun hires Magnum and Higgins to investigate a mysterious and large cash donation made to a parishioner undergoing medical treatment at the church. Also, Jin’s new dog walking business takes a dramatic turn, and Rick nervously prepares to reconnect with Suzy.
Directing: Lin Oeding · Writing: Gene Hong, Andre Jackson · Starring: Leif Gantvoort, Lindsay Pulsipher, Bobby Lee, Betsy Phillips
4x12 Angels Sometimes Kill
Shammy asks Magnum and Higgins to locate his missing friend, a homeless veteran. Also, T.C. tries to get Cade to return to school, but quickly learns it’s not that simple.
Directing: Marcus Stokes · Writing: Barbie Kligman, Mike Diaz · Starring: Victoria Barabas, Tara Buck, Martin Martinez, Christopher Thornton
4x13 Judge Me Not
When Hawaii Supreme Court nominee Judge Rachel Park is being blackmailed, she hires Magnum and Higgins who go to extraordinary lengths to help her out. Also, with the pressure of fatherhood looming, Rick suggests changes to make La Mariana more profitable, but TC and Kumo aren’t swayed.
Directing: Benny Boom · Writing: David Slack · Starring: Moon Bloodgood, Maya Stojan, Wylie Small, Nicole Pierce
4x14 Run, Baby, Run
A bail bondsman hires Magnum and Higgins to track down a woman who skipped out on her $250,000 bond. When they locate the body of another P.I. who was previously searching for her, they partner with Det. Lia Kaleo on the case. Also, T.C. and Katsumoto team up on an emotional search for Cade’s mother.
Directing: Roderick Davis · Writing: David Wolkove · Starring: Vince Shin, Don Swayze, Tim Griffin, Veronica Díaz-Carranza
4x15 Dead Man Walking
When Magnum balks at notorious crime boss Osi Shima’s (Eijiro Ozaki) request to find his missing son, Magnum learns he’s been poisoned and has only eight hours to locate Shima’s son to earn the antidote, or else he dies.
Directing: David Straiton · Writing: Gene Hong · Starring: Bobby Lee, Levy Tran, Eijiro Ozaki, Rich Ting
4x16 Evil Walks Softly
The mother of a suspected bomber hires Magnum and Higgins to locate her teen son and turn him in to the authorities. Also, Kumu and Rick help T.C. navigate his guilty conscience when he runs into a past flame.
Directing: Alexandra La Roche · Writing: Tera Tolentino · Starring: Janel Parrish, Alexie Gilmore, Parker Queenan, Dennis Chun
4x17 Remember Me Tomorrow
Higgins is in a complicated situation when 12-year-old Ella asks for help cracking a triple homicide that involves her mother. Also, Magnum bonds with Bob, a terminally ill veteran, while volunteering with the No Veteran Dies Alone Program and attempts to reunite him with his estranged family.
Directing: Bryan Spicer · Writing: Barbie Kligman, Katie Varney, Mike Diaz · Starring: Max Gail, Robert Pine, Hala Finley, Niall Matter
4x18 Shallow Grave, Deep Water
Magnum goes to extreme lengths to uncover the truth about a crime that may have involved his dear deceased friend, Nuzo.
Directing: Jay Hernandez · Writing: David Slack · Starring: Domenick Lombardozzi, Robert Pine, Tiffany Hines, Christopher Thornton
4x19 The Long Sleep
A disoriented man hires Magnum and Higgins to investigate a crime he doesn’t remember after he woke up on the beach covered in blood. Also, T.C. is taken aback when Cade’s biological grandmother makes a surprise visit, and Rick’s feelings for Suzy grow stronger as they prepare for the birth of their first child.
Directing: Eagle Egilsson · Writing: David Wolkove, Mike Diaz, Andre Jackson · Starring: Martin Martinez, John Bobek, Teressa Liane, Betsy Phillips
4x20 Close to Home Season Finale
Magnum and Higgins are sent on a deadly mission inside a high security correctional center when a ruthless criminal abducts Katsumoto and his ex-wife, Beth.
Directing: Bryan Spicer · Writing: Eric Guggenheim · Starring: Christopher Thornton, Betsy Phillips, Chantal Thuy, Shawna Christensen
Season 4 Cast
Stephen HillTheodore 'T.C.' Calvin20 episodes
Tim KangGordon Katsumoto20 episodes
Chantal ThuyDet. Lia Kaleo11 episodes
Martin MartinezCade Jensen7 episodes
Christopher ThorntonKenny 'Shammy' Shamberg6 episodes
Betsy PhillipsSuzy Madison5 episodes
Yancey AriasAgent Ray Sloane3 episodes
Bobby LeeJin Jeong3 episodes
Taiana TullyDetective Palea2 episodes
Shawna ChristensenBeth Katsumoto2 episodes
Tijuana RicksDr. Linda Ogawa2 episodes
Michael deLaraGabriel Santos2 episodes
Rich TingTower2 episodesAll Seasons
Season 12018 · 20 ep. · ★ 7.1
Season 22019 · 20 ep. · ★ 7.0
Season 32020 · 16 ep. · ★ 6.9
Season 52023 · 20 ep. · ★ 8.0Where to Watch Season 4 of Magnum P.I.
Frequently Asked Questions
How Many Episodes Are in Season 4 of Magnum P.I.?
Season 4 of Magnum P.I. has 20 episodes.
When Did Season 4 of Magnum P.I. Premiere?
Aired October 1, 2021.
Where to Watch Season 4 of Magnum P.I.?
Available by subscription on Amazon Prime Video, Movistar Plus+, Movistar Plus+ Ficción Total, Tivify, and Amazon Prime Video with Ads (availability may vary by country).