The fifth season of Medium, an American television series, consisted of 19 episodes, premiering on February 2, 2009, and ending on June 1, 2009.

[5] Within 24 hours of NBC's cancellation, CBS, whose production arm produces the series, renewed the show for a full 22-episode season.

Allison finds herself being stalked by a deranged fanatic and gets the job opportunity of a lifetime, but it's for the boss whose son is a serial killer so they can keep her quiet since she works for the DA.

Keener while still in prison for killing her daughter's killer helps Allison save the young woman.

Enzo Rossi, the real life son of Patricia Arquette, plays a character in the episode A Person of Interest.