Clayton "Clay" Webb was the youngest deputy director of the Central Intelligence Agency in the history of the CIA. Webb is played by Steven Culp.
Webb has always been a questionable allegiance to Harm and Mac's investigations. Clay was always well dressed in three piece suits (until his demotion for defying his superiors in giving information to Harm).
After his demotion, Clay was undercover with Gunnery Sergeant Victor Galindez (Randy Vasquez), requiring Mac to go undercover with him as his pregnant wife (used to cover Catherine Bell's real life pregnancy), where Webb was tortured and nearly killed.