Black Mirror never shies away from evocative plotlines, but chatter about this summer's "Striking Vipers" episode was fervid — even by its own standards. The season five opener of Charlie Brooker's Netflix series saw Anthony Mackie explore virtual gaming on an extremely intimate level while addressing issues of sexuality and infidelity (and spawning countless think pieces). The episode centers on two longtime platonic friends, Danny (Mackie) and Karl (Yahya Abdul-Mateen II), who find themselves pushing the boundaries of their relationship while plugged into a Vr version of a Mortal Kombat-inspired video game they played in their college days....