NCIS (2003)

S2E15 Caught on Tape

The team investigates the mysterious death of a Marine who, in a chilling twist, filmed his fatal plunge from a cliff. The main suspects turn out to be his wife and his closest friend, who had spent the day with him at a picnic in the woods. As Gibbs digs deeper, he uncovers a secret affair that had been hidden from the deceased, complicating the case further.