In Richard Hanley's book The Metaphysics of Star Trek the appearance of the Traveler in "Where No One has Gone Before" was described as a continuation of intellectually-advanced aliens in Star Trek, beginning in The Original Series with Apollo in "Who Mourns for Adonais?" and Gary Mitchell in "Where No Man Has Gone Before".
I Richard Hanley's bok The Metaphysics of Star Trek beskrivs Resenärens medverkan i "Where No One has Gone Before" som en fortsättning på temat med intellektuellt avancerade utomjordingar i Star Trek, som tog sin början i The Original Series med Apollo i "Who Mourns for Adonais?" och Gary Mitchell i "Where No Man Has Gone Before".