Fall is coming! The first two episodes of a new Marvel TV series, presented in IMAX prior to release on ABC, Inhumans (B) is a fairly formulaic but mostly well executed comic book adaptation of a royal espionage action drama, as realized by director Roel Reiné. As a baddie leading a coup on a secret city on earth’s moon, Iwan Rheon is a forceful presence and eclipses all other actors. Less successful is Anson Mount as his brother the king, ostensibly the protagonist. He manages a vacant performance of questionable facial expressions while mute. As his wife Medusa (so named for her supernatural serpentine locks), Serinda Swan is commanding. Most of the titular band of mutants are separated during this mega-episode, so it’s not completely clear how their camaraderie will click in the long term. But the creativity of the source material carries the day in a brisk and bright tale of intrigue. The cliffhanger sets a pretty good stage for events ahead.