Complex sentence: "Coup D'etat" ("Stargate Atlantis") In truth, Kolya had been planning a coup of his own against Cowen, although Radim eventually betrayed him by carrying out the coup himself.
Split into simpler sentences: Coup D'etat ("Stargate Atlantis") However, Radim had not been completely truthful. Instead, Kolya had been planning a coup of his own against Cowen, although he was eventually betrayed by Radim, who carried out the coup himself.