Complex sentence: Zola returns in the two-part episode "Attack of the Synthezoids", in which he replaces S.H.I.E.L.D. Academy's staff and students at the Triskelion with Synthezoids, leaving only Spider-Man, Cloak, Agent Venom and Rhino to fight.
Split into simpler sentences: Zola returns in the two-part episode "Attack of the Synthezoids". He replaces S.H.I.E.L.D. Academy's staff and students at the Triskelion with Synthezoids, leaving only Spider-Man, Cloak, Agent Venom and Rhino to fight.