- "Little creep. He's like the bastard grandson of J. Edgar Hoover."
- —Tom Morrow describing Parsons in the Season 10 finale episode, "Damned If You Do".
Richard Parsons is a IG investigator who works for the Department of Defense.
After a bombing occurred that resulted in the death of SECNAV Clayton Jarvis in the Season 11 premiere episode, Whiskey Tango Foxtrot (episode), Parsons's perspective on Gibbs and his team changed after Gibbs defended him during an ambush in Iran.
Parsons later repaid the debt by saving Gibbs's life during a gunfight.
Later, back in Washington D.C., Parsons dropped his investigation into NCIS and also granted McGee and DiNozzo permission for both men to get their badges back and become NCIS Special Agents again although McGee, DiNozzo and Abby still regarded Parsons with some suspicion.