If you're an overweight slob with a job you hate then maybe you just need to be inhabited by an ancient alien entity who can teach you some discipline and help you get your life in order. But before you sign up be aware that you'll be picking a side in a centuries old war among the aliens to decide the fate of humanity, and you'll have a very good chance of getting killed in the process. So maybe you want to take another look at that new diet after all? 
 This was entertaining but felt relatively light weight. The idea of a wise old entity stuffed into the meat sack of a whiny slacker was played for some good laughs, and I liked the idea of a covert war being waged between two alien factions. I would have enjoyed it more focus on the history of Tao and the other aliens on Earth, and a little less on Roen as a rehabilitation project.