With the promise of warmer weather just around the corner, a slew of new and returning television shows are hitting the airwaves. HBO welcomes back Game of Thrones on March 31, AMC travels back in time for another season of Mad Men on April 7, and Sundance Channel offers two spellbinding new original dramas: Top of the Lake, a mystery series from co-creator Jane Campion, and Rectify, a searing drama that looks at what life is like after being released from prison after 19 years. But it’s not all heavy drama: two serial killer thrillers are on tap, with A&E’s Bates Motel squaring off against NBC’s Hannibal (as in Lecter), the Doctor returns with a new companion in Doctor Who, and HBO’s Veep returns for another season of vice-presidential comedy. Jace Lacob rounds up 15 new and returning television shows that are worth checking out this spring.