Javier Manuel Hernandez Jr. is an American actor and fashion model. After making his television debut in NBC's Hang Time, Hernandez made his film debut opposite Kirsten Dunst in the romantic drama Crazy/Beautiful.

Jay Hernandez plays as Thomas Magnum in Magnum P.I..
Jay Hernandez is the top #1 member of the cast and appears in 47 episodes.

Perdita Weeks (born 25 December 1985) is a Welsh actress. Perdita was born in South Glamorgan, educated at Roedean School and studied art history at the Courtauld Institute. She is the younger sister of Honeysuckle Weeks and the older sister of Rollo Weeks. She portrayed Mary Boleyn (King Henry VIII's sister-in-law) in the Showtime drama The Tudors (2007). In 2008 she appeared as Lydia Bennet in the ITV series Lost In Austen. She played a murdering teen in the Death and Dreams episode of Midsomer Murders in 2003. She has worked on productions such as Stig of the Dump (2002), Sherlock Holmes and the Case of the Silk Stocking(2004), and Miss Potter (2006) (but was cut from the latter) and played the role of Kitten (daughter of a rock star) in an episode of Lewis—"Counter Culture Blues" (2009). In 2007 she appeared in the radio comedy Bleak Expectations. In 2011 she appeared in the TV miniseries The Promise. She is the sister of actors Honeysuckle Weeks, to whom she bears a strong resemblance, and Rollo Weeks; she co-starred with the former in Goggle Eyes (1993) and Catherine Cookson's The Rag Nymph (1997), in which she played the younger version of her sister's character. She stars also in the 2010 Horror film Prowl.

Perdita Weeks plays as Juliet Higgins in Magnum P.I..
Perdita Weeks is the top #2 member of the cast and appears in 47 episodes.

Zachary Andrew Knighton (born October 25, 1978) is an American actor who currently stars as Dave Rose on the ABC comedy series Happy Endings. Prior to that, he co-starred as Dr. Bryce Varley on ABC's science fiction series FlashForward from 2009–2010. Description above from the Wikipedia article Zachary Knighton, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Zachary Knighton plays as Orville “Rick” Wright in Magnum P.I..
Zachary Knighton is the top #3 member of the cast and appears in 47 episodes.

Stephen Hill plays as Theodore “T.C.” Calvin in Magnum P.I..
Stephen Hill is the top #4 member of the cast and appears in 47 episodes.

Amy Hill is an American actress and writer. Hill was born in Deadwood, South Dakota to a Japanese American mother, Ayako Yoneoka Hill, and a Finnish American father, Archie Russell Hill.

Amy Hill plays as Kumu in Magnum P.I..
Amy Hill is the top #5 member of the cast and appears in 27 episodes.

Tim Kang (born March 16, 1973, in San Francisco, California), is a Korean American television and film actor.

Tim Kang plays as Det. Gordon Katsumoto in Magnum P.I..
Tim Kang is the top #6 member of the cast and appears in 27 episodes.