Junior Reigns came up to Steve asking for a job, but he was denied. Days later, Junior continues to do things to please Steve, including washing his car, who then tells him that if he finishes the police academy, he would offer him a job. After an incident, Junior helps Steve with a bank robbing and continues to prove himself again.
- Got out of the navy as Special Operator 2nd Class. 2 hours after he "got back from the sandbox" he was on Steve's doorstep.
- Junior went to Steve on the word of his Master Chief David Lange (Steve's dive buddy) that Steve was the best.
- Junior's parents are mad at him for enlisting in the Navy and becoming a SEAL. Despite his own father serving in the United States Navy. 
- Junior officially becomes a member of Hawaii Five-0 Task Force. 
- Made his first on-screen kill. 
- Shot in the shoulder. 
- Junior Reigns had a sister, Maya, but she was killed by a drunk driver. 
- Junior has an ex-girlfriend before his appearance, whom later split up with him . She is now married to another man, Tory, and has one son, named Kai.
|The Skin Has Been Hurt by the Point of the Spear||Knocked Flat by the Wind; Sudden Disaster||Passing Time Obscures the Past||Tiny is the Flower, Yet it Scents the Grasses Around It||Don't Blame Ghosts and Spirits for One's Troubles; a Human is Responsible||All Knowledge is Not Learned in Just One School||DNA||That Way and This Way Shifts the Sand of Punahoa||The Trunkless Tree of Kahilikolo||You and Me, It Is Hidden||To Return Evil for Evil||Where Were You When the Rain was Pouring?||The Rat was Caught Right in the Nest|
|There Was a Lull, and then The Wind Began to Blow About||Yours is the Mouth of an Octopus||Man is a Slave of Love||Like a Whirlwind, Whirling the Dust Upward||Lost in the Sea Sprays||Home Go the Very Tough Lads of the Hills||A Gripping Cuttlefish||He Cannot be Caught for He is an Ulua Fish of the Deep Ocean||Goodbye|
|Hawaii Five-0 Characters|
|Final||Steve McGarrett • Danny Williams • Adam Noshimuri • Tani Rey • Junior Reigns • Lou Grover • Kamekona Tupuola • Duke Lukela • Noelani Cunha • Quinn Liu|
|Former||Chin Ho Kelly • Kono Kalakaua • Max Bergman • Catherine Rollins • Jerry Ortega|
|Other||Lori Weston • Mary McGarrett • Grace Williams • Charles Williams • Jenna Kaye • Dr. Malia Waincroft|