The remains of Errol Flynn’s son Sean, who starred in a half-dozen European movies — most notably following in dad’s footsteps with the swashbuckler “The Son of Captain Blood” — are believed to have been discovered in Cambodia. After his movie career ended, the younger Flynn — the only product of Errol’s first marriage to actress Lili Damita — worked as a freelance photographer in the Cambodian war, where he disappeared in 1970, 11 years after his father’s death. Forensic tests are pending to confirm his identity.