Question: who are the guest stars on ncis tonight?
Answer: Pictured: Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Christopher Lloyd as Joe Smith, Wilmer Valderrama as NCIS Special Agent Nicholas Torres. Tonight's episode of NCIS, titled “The Arizona,” guest stars 81-year-old actor Christopher Lloyd as Joe Smith, a man who claimed he was on the U.S.S.