 At the end of the fifth season, Ferguson was buried alive and her fate was left unknown.It was previously unknown if Rabe would reprise her role as Joan Ferguson for the sixth season; however, she began appearing from episode seven of the twelve-part season, as a figment of character Will Jackson's imagination.Although the character was presumed dead, it is finally revealed in the season seven finale that she is alive and will return for the eighth season in 2020.