The Hidden Man (2003)

Mark and Benjamin Keen have not seen their father, Christopher, for 20 years. When he reappears hoping for a reconciliation, he has only begun to shed light on his shadowy past before being killed by an unidentified assailant. His violent death leaves questions unanswered. Was his murder an act of retribution? Had he been silenced for discovering a conspiracy involving Mark? Or had the carefully constructed facade of his past simply collapsed? As the truth unfolds, his sons must face the legacy of their father's life as a spy.