Complex sentence: The kingpin turns out to be a thought-dead friend and war-buddy of Beckett's, Paul Finnegan (John Doman), and the real purpose of the mission turns out to be something other than what Beckett was told.
Split into simpler sentences: The kingpin turns out to be a thought-dead friend and war-buddy of Beckett's, Paul Finnegan (John Doman). The real purpose of the mission turns out to be something other than what Beckett was told.