High Quality Content by WIKIPEDIA articles! "Shells" is episode 16 of season 5 in the television show Angel. Angel and Spike return from England defeated, knowing that the ancient demon spirit Illyria has completely taken over Fred's body and soul, turning her into a super-strong, blue-haired, blue-eyed entity bent on destruction. Upon learning that Knox and Gunn have each contributed to her demise ? Knox brought the ancient sarcophagus to Fred in the first place, and Gunn inadvertently allowed it to enter the building ? Wesley is bent on revenge and wants to kill both of them, while Angel tries everything to restore Fred. Meanwhile, Illyria tries to locate an ancient temple where she believes she will find an army ready to help her destroy mankind.