TV Article Jonathan Tucker joins 'Justified' for final season By Teresa Jue Published on January 7, 2015 12:00PM EST Photo: Michael Buckner/Getty Images for DIRECTV EW has confirmed that Kingdom's Jonathan Tucker has joined Justified for its final season. The Hollywood Reporter first reported the news. According to THR, Tucker recently started filming his role as Boon, a hired gun of Katherine Hale's (Mary Steenburgen) ex, Avery Markham (Sam Elliot), and is set to appear in the final five episodes of the series. Tucker also stars as Jay Kulina on Kingdom, which was picked up for seasons two and three on DirecTV. Justified's final season begins Tuesday, Jan. 20, on FX.