Why 'Friends' is the 'heartbeat' of Julia Roberts sci-fi movie 'Leave the World Behind'

"Friends" plays a pivotal emotional role in Esmail's movie, which stars Julia Roberts, Ethan Hawke, Mahershala Ali and, in a small but powerful role, Kevin Bacon. (In the mid-'90s, Roberts appeared briefly on "Friends" and dated Perry for three months.) The plot of "Leave the World Behind" revolves around a vacationing family,...