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The episode title is a reference to Joseph Campbell's concept of the [https://en.wikipedia.org/wiki/Hero%27s_journey Hero's Journey] from his book [https://en.wikipedia.org/wiki/The_Hero_with_a_Thousand_Faces ''The Hero of a Thousand Faces''], which outlined a fundamental structure to many myths from different cultures. Creator [[Eric Kripke]] has said he was strongly influenced by these ideas when developing the series. In a tweet on the day of the series finale, Kripke shared [https://twitter.com/therealKripke/status/1329446838093623302 early notes] for the series that include him explaining how the novel inspired him and why the "search for dad" story couldn't last for years, "So... I went for the most CLASSIC structure possible. Hero's Journey." [[Tommy Collins]] can be seen reading ''The Hero of a Thousand Faces'' in [[1.02 Wendigo]].
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