As with most Rush songs, the lyrics are written by Neil Peart, and the music by Geddy Lee and Alex Lifeson.

It is based on two episodes of The Twilight Zone: "Will the Real Martian Please Stand Up?"

[2] Rush dedicated the song to the memory of The Twilight Zone creator Rod Serling.

[3] The creators of the Marvel comic book series Defenders dedicated its 45th issue to Rush.

[4] Steven Wilson recorded a version of this song in 2016, which was included on the 40th anniversary reissue of 2112.