The third season of the crime and action drama Magnum P.I. premiered on December 4, 2020, on CBS, for the 2020–21 United States network television schedule. The series is a remake of the 1980 series of the same name and centers on Thomas Magnum, a former Navy SEAL who works as a private investigator and solves mysteries with his business partner Juliet Higgins and other friends. It stars Jay Hernandez, Perdita Weeks, Zachary Knighton, Stephen Hill, Amy Hill, and Tim Kang. The season was ordered on May 8, 2020. It was later revealed that the season would only consist of 16 episodes as a result of the COVID-19 pandemic in the United States. Multiple Hawaii Five-0 stars appeared as their Hawaii Five-0 characters in minor crossover events throughout the season and a possible crossover between