Meet the Cast of Prime Video's 'On Call'

If you love police dramas, Dick Wolf's latest procedural starring Troian Bellisario should be on your watch list.

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A female cop (Troian Bellisario) holds a male cop's (Brandon Larracuente) arms, in 'On Call.'
(Image credit: Erin Simkin/Prime Video)

If you're a ride-or-die Law & Order: SVU fan, Prime Video's new drama On Call may be next on your watchlist. Executive produced by Dick Wolf himself, the new eight-episode series doubles as a procedural and enticing murder mystery, starring Pretty Little Liars alum Troian Bellisario as a police officer training her department's new rookie, while also investigating the death of one of her fellow officers.

Since its release on January 9, the quick watch has risen to the No. 1 spot on Prime Video's Top 10. If you've watched and want to know the background of the show's familiar faces, read on for a breakdown of the cast of On Call.

Troian Bellisario as Traci Harmon

Troian Bellisario as Long Beach police officer Traci Harmon in 'On Call.'

(Image credit: Elizabeth Morris/Prime Video)

At the start of On Call, Long Beach training officer Traci Harmon is still grieving the loss of her former rookie, and hunting down the killer. She has her guard up when she's assigned to train a new officer, Alex Diaz.

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Troian Bellisario is an actress born and raised in L.A. who had an early supporting role in the 1998 Olsen Twins movie Billboard Dad. Her breakout was on Spencer Hastings on ABC Family's popular teen drama Pretty Little Liars, where she starred in 160 episodes and made her TV directing debut. Since, she has appeared in 2019's Where'd You Go, Bernadette; ABC's Stumptown, and CBC's Plan B.

Brandon Larracuente as Alex Diaz

Two police officers (Brandon Larracuente as Alex Diaz and Troian Bellisario as Traci Harmon) laugh in the front seat of a police car in 'On Call.'

(Image credit: Courtesy of Amazon MGM Studios)

Alex Diaz is an impulsive rookie cop who strains against the strict rules Traci orders him to follow.

Brandon Larracuente, 30, started his career as a child theater actor, with roles Off-Broadway, and went on to star in shows including Netflix's Bloodline, Freeform's Party of Five, and ABC's The Good Doctor. He's best known for playing Jeff Atkins in the first two seasons of Netflix's 13 Reasons Why.

Lori Loughlin as Lieutenant Bishop

Lori Loughlin as Lieutenant Bishop, wearing a police officer uniform and carrying a clipboard, in 'On Call.'

(Image credit: Elizabeth Morris/Prime Video)

Lieutenant Bishop, Traci's mentor and supervisor, is played by Lori Loughlin, 60, in her first major role since the Varsity Blues college admissions scandal. Loughlin is best known for playing Aunt Becky in the beloved sitcom Full House and its Netflix revival Fuller House. She has also held supporting roles in CBS's The Edge of Night, The CW's 90210, and the Hallmark Channel's When Calls the Heart.

Eriq La Salle as Sergeant Lasman

Eriq La Salle as Sergeant Lasman in 'On Call.'

(Image credit: Elizabeth Morris/Prime Video)

Sergeant Lasman disagrees with Traci's tactics, but ultimately respects her as an officer and keeps her out of trouble behind the scenes.

Eriq La Salle—who also executive-produces On Call and directs four episodes—is best known for two iconic roles: Dr. Peter Benton on the NBC drama ER, and Darryl "Prince of Soul Glo" Jenks in 1988's Coming to America. The 62-year-old actor, director, and author's other notable credits include 2002's Crazy as Hell, HBO's How to Make It In America, and 2017's Logan.

Rich Ting as Tyson Koyama

A police officer (Rich Ting as Tyson Koyoma), speaking to a female officer as they stand in front of a brown truck, in 'On Call.'

(Image credit: Elizabeth Morris/Prime Video)

Rich Ting, 44, plays Officer Koyoma, who leads the department's narcotics division. Ting grew up in L.A. and played football at Yale before transitioning to acting and splitting his time between the U.S. and South Korea. Stateside, he's best known for appearing in Max's Warrior, Prime Video's The Man in the High Castle, Netflix's Partner Track, and Paramount+'s Tulsa King. He has also provided English voiceover work for several K-dramas, including My Name, All of Us Are Dead, The 8 Show, and Squid Game season 2.

Quinci LeGardye
Quinci LeGardye
Culture Writer

Quinci LeGardye is a Culture Writer at Marie Claire. She currently lives in her hometown of Los Angeles after periods living in NYC and Albuquerque, where she earned a Bachelor’s degree in English and Psychology from The University of New Mexico. In 2021, she joined Marie Claire as a contributor, becoming a full-time writer for the brand in 2024. She contributes day-to-day-content covering television, movies, books, and pop culture in general. She has also written features, profiles, recaps, personal essays, and cultural criticism for outlets including Harper’s Bazaar, Elle, HuffPost, Teen Vogue, Vulture, The A.V. Club, Catapult, and others. When she isn't writing or checking Twitter way too often, you can find her watching the latest K-drama, or giving a concert performance in her car.