The drama pilot will star Meagan Good as Joanna Locasto, a detective who was raised by a wealthy heiress.
Learning that the heiress has died in mysterious circumstances, she goes undercover in her old family to investigate.
Alonso will play the lead male role of Will Sacovitch, the NYPD cop who recruits Locasto for the mission, according to Deadline.
The actor starred on A&E's Breakout Kings and also appeared on cop drama Southland. His film credits include 2009's Avatar and the same year's Fast & Furious.
Other stars attached to Notorious include Victor Garber (Alias), Katherine LaNasa (Big Love), Neil Jackson (FlashForward) and Tate Donovan (Damages).
The pilot will be produced by Alphas execs Gail Berman, Lloyd Braun and Gene Stein.
> Ella Rae Peck, Makenzie Leigh cast in NBC drama pilot Notorious
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