Filmmaker Nathan Fielder is known for blurring the lines between reality and fiction—but his new documentary interrogates the very concept of truth itself. You Can See Everything , which Fielder stars in and codirected with Lance Oppenheim, takes an up-close-and-personal look at Elizabeth Holmes , who was convicted of fraud in connection with her blood testing startup Theranos.

Known for his docu-reality series Nathan For You and The Rehearsal, the Canadian comedian has never before been involved in a regular documentary, so it’s not surprising that You Can See Everything is far from ordinary.

Fielder lived with Holmes and her family for 34 days before her prison sentence began, during which time Holmes continued to maintain her innocence.…