The film was directed and co-produced by James Lapine, based on an idea by Frank Rich[1] and "centers on the backstory of six great Sondheim songs".

[2] The film has performances of six of Sondheim's signature songs: In the documentary, Sondheim himself performs along with Audra McDonald, Jeremy Jordan, Darren Criss, America Ferrera, Jackie Hoffman and Laura Osnes.

[5] The documentary consists of both original short films of several of the songs plus existing material.

"[1] The film was edited by Miky Wolf who gave an interview to The Red Room Podcast on episode 68.

National Public Radio highly recommended the documentary stating that Six is "a superbly compiled work, overseen by two of the people most intimately familiar with the composer himself...If you're new to the works of Stephen Sondheim, this TV special should entice you.