Grimm (9 p.m., NBC) – The fifth season begins, and in the wake of his mother’s beheading and Juliette’s death, things have never been more chaotic for Nick (David Giuntoli). Having lost so much, Nick must dig deep and decide what type of person he wants to be, while also coming to grips with fathering a child with his once sworn enemy, Adalind (Claire Coffee). His search for the truth leads him to FBI Agent Chavez (guest star Elizabeth Rodriguez) and puts him at odds with those close to him. Russell Hornsby, Silas Weir Mitchell, Sasha Roiz, Reggie Lee and Bree Turner also star.
Also on tonight . . .
Dr. Ken (8:30 p.m., ABC) – Twenty years after Ken botched a proposal to Allison on Halloween, he attempts a redo. ABC recently gave this show a full season order.
Hawaii Five-0 (9 p.m., CBS) – On Halloween, the team tracks a serial killer inspired by an iconic character.
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Elfman: Tim Burton Film Music (9 p.m., UNC-TV) – Live from Lincoln Center, performances of musical scores by Danny Elfman, written for films made by director Tim Burton.
Satisfaction (10 p.m., USA) – Neil and Simon come to a tenuous business alliance.
Z Nation (10 p.m., Syfy) – Murphy is captured by an unbalanced zombie fan, who is eager to add him to a zombie museum.