Billy Evans and Elizabeth Holmes in "You Can See Everything." A24

In " You Can See Everything ," one person apparently took the movie's title to a physical extreme.

A24's twisty new documentary is ostensibly focused on Theranos founder Elizabeth Holmes , one of Silicon Valley's most infamous felons — yet it's her longtime partner, William "Billy" Evans , who frequently steals the show.

Evans' comfort in front of the camera is evident when the couple invites co-directors Nathan Fielder and Lance Oppenheim to capture intimate moments in their home life, just a few weeks before Holmes is scheduled to begin an 11-year prison sentence .

In fact, according to Oppenheim, Evans proactively suggested one of the movie's buzziest and most revealing moments: a full-frontal shot of Evans in the shower.

"We were in the car ride on the way back from the gym, and I said to Billy, 'We will give you some time to shower,'" the filmmaker said in a recent interview with GQ .…