American Dad! has announced details of its 18th series – get all the details and watch its trailer below.After launching its 17th outing in April 2020, featuring an episode co-written by The Weeknd, the TBS show will return once again this spring.Season 18 of American Dad! is set to begin airing on April 19, and its new trailer sees Roger and Steve becoming “venom harvesters,” pioneering anti-venom techniques to save lives against poisonous snakes.Watch the new trailer below.The cult animated