Tired of always being on the run from SERVEYOUinc, the Doctor tries to buy the corporation...but it doesn't work out as he planned! Can companions Alice Obiefune, Jones and ARC rescue the Doctor from himself? Plus, tracking a falling meteor back into the past sees the TARDIS team colliding with warring Roman Emperors in 312AD - as a malevolent alien force crawls from the crater! And that's all just a preface to this year's epic season finale!