Nothing is as satisfying as a big TV twist — a jaw-dropping finale or midseason moment that reinforces why the audience gravitated to an exceptional show to begin with, and why they’ll either come back for more or forever crave it. Max’s “Full Circle” isn’t dealing in excessive convolution — not yet anyway — but Episodes 3 and 4 meter out small twists in just the right dosage, counteracting some slow plot development with clarity about past and current events.