Complex sentence: This affair is discovered by Lord Wictred (Mark Strong), a longstanding dissenter to Marke's leadership, conspires with Donnchadh to use their love to overthrow Marke, with Wictred getting Marke's throne in exchange.
Split into simpler sentences: This affair is discovered by Lord Wictred (Mark Strong), a longstanding dissenter to Marke's leadership. He conspires with Donnchadh to use their love to overthrow Marke, with Wictred getting Marke's throne in exchange.