Stick with this series. Just when it seemed like superhero TV series had run out of steam, FX gave us Legion last season, and now Fox gives us The Gifted – two very smart dramas based on minor characters from the Marvel comics universe. Last week’s premiere episode of The Gifted did a fine job establishing both characters and conflicts – and tonight’s second episode deepens both of those explorations, with an episode as strong on exciting special effects as it is on dramatic character development. And for now, the various characters have yet to unite: some are under siege, another is in government custody, and yet another, Polaris (pictured), is imprisoned, and saddled with an electronic “flea collar” that inhibits her use of her paranormal powers.