04E14 - Goodbye Iowa

Professor Maggie Walsh's only fellow researcher on project 314, Dr. Angelman, finds her killed by it, the 'demonoid' she assembled from various monster, man and machine parts as an ultimate warrior. Adam is now loose and kills without any conscience. Giles can't maintain the Initiative won't come to his home when Riley turns up, so the gang hides at Xander's while Spike barely escapes them by hiding under a corpse in a tomb in his crypt, later to become attacked by demons who realize he turned good. Willow and Tara fail to locate the demon by summoning the dark goddess Tespia. Riley gets sick and aggressive, withdrawal from the drugs Maggie secretly mixed in the commandos' food, but goes after Buffy and Xander, who interrogated Willy the Snitch with him earlier and now break into the Initiative's military facility, where Adam also got in and explains he sees Riley as Maggie's other favorite (brain)child; Riley's rejection causes a fight.