Time: the most familiar, and most mysterious quality of the physical universe. Theoretical physicist Brian Greene, PhD, has been challenged to explain the nature of time to 5 different people; a child, a teen, a college student, a grad student, and an expert.

Director: Maya Dangerfield
Producer: Wendi Jonassen
Field Producer: Katherine Wzorek
Director of Photography: Charlie Jordan
Editor: Shandor Garrison
Host: Brian Greene
Level 1: Kayla Martini
Level 2: Maria Guseva
Level 3: Zain Kamal
Level 4: Alexander Novara
Level 5: Massimo Porrati

Line Producer: Joseph Buscemi
Associate Producer: Paul Gulyas
Production Manager: Eric Martinez
Production Coordinator: Fernando Davila
Casting Producer: Nick Sawyer

Camera Operator: Britney Berger
Gaffer: Gautam Kadian
Audio: Brett Van Deusen
Production Assistant: Nicole Gaitan
Hair/Makeup Artist: Yev Write-Mason

Post Production Supervisor: Alexa Deutsch
Post Production Coordinator: Ian Bryant
Supervising Editor: Doug Larsen
Assistant Editor: Andy Morell