At the art gallery, Gabby says: "Its like a kids book. Meet Dick and Jane. See Jane kill Dick. See Jane bury Dick. Run Jane, run!". This is a reference to the 'Dick and Jane' children's book series, which was first introduced in the 1930s. Until the 1970s, first-grade students in the United States learned to read though these stories.
The title of this episode "Suspicion Song", comes from the title of an unproduced song from the Stephen Sondheim musical "The Race to Urga" (1968).
Andre Zeller says: "Some are born great. Some achieve greatness, and others have greatness thrust upon them". This is a quote from the play 'Twelfth Night' (written around 1601-1602), by William Shakespeare.
This is the final appearance of Andre Zeller (Miguel Ferrer). In real-life, the actor died in January 2017, age 61, from throat cancer. He was a first cousin of fellow actor, George Clooney.
Susan makes several jibes about Felix Bergman's (Leslie Jordan) height. The actor was 4' 11".