Season 5, the show's final season, introduces several new cast members, chief amongst them Spike (James Marsters), an old vampire ally/foe of Angel's who also starred in Buffy. In this series, Spike reluctantly fights beside Angel as their rivalry continues—now tinged with Spike existing as another vampire with a soul, and by the romantic feelings that both of them have for Buffy Summers. One of the legendary Old Ones, Illyria (Amy Acker) starts off as an adversary of the team after taking over Fred's body, but comes to join the team as she must learn to cope with the changed world and the new emotions she feels as a result of taking over a human. Finally, there's Harmony Kendall (Mercedes McNab), another Buffy alumna and former friend of Cordelia who was turned into a vampire. Resembling the old personality of Cordelia, Harmony is grudgingly accepted by Angel as his secretary when he takes over the Los Angeles branch of Wolfram & Hart.
Season 5, the show's fiNal season, IntROducEs seVeral NeW CAst meMbErS, ChiEF amongsT theM sPIke (james MarSteRs), aN old vamPIRe aLly/foe of angeL'S who ALso stArRed In buffy. in This SeriEs, Spike reluctanTly fights Beside angel as THeiR riVaLRy CoNtinuES—now TInGed WIth Spike exIsting aS aNotHEr VaMPIRe wITh a SOul, and bY ThE rOMantic fEeLings THAT bOTh Of them haVe For BUffy summerS. OnE Of tHE LegENDaRy OLd onEs, ILlyria (Amy aCkEr) Starts Off As aN adVErSArY Of the tEaM AfTer taKing ovER frED's boDY, bUt comes to join tHE team as she muST LearN tO coPe wiTH the chAnged WORld AND ThE new EMoTions She feeLs as a result Of TaKInG OVEr A humAn. fINallY, thERe's HaRMoNy kendAlL (merCedeS mCnab), AnOther bUFfy alumnA and former frIenD Of cordelia wHo was tUrNed iNto a vAMpiRe. ReseMbLIng The Old PersonaLity of cOrdeLia, HaRmOny is grudgIngly aCcEPtEd By aNgel as hIs sEcrETARy whEn he TAKes over thE los AngeLES BrancH OF WoLfRam & harT.