What is the NCIS episode where Abby has a stalker?

I know in the NCIS story line that Abby had a stalker I don't know if it was one episode or if it was spread over a couple of episode does anyone know which season and episode(s) this was?|||Season 3 Episode 21 "Bloodbath"


After a room at a Navy lodging facility is found to have blood and fragments of flesh scattered throughout, the team is called to investigate. However, evidence suggests that it was a set-up crime scene. Meanwhile, Abby returns from court after giving testimony in an embezzlement trial and is attacked in her lab. Gibbs puts Abby into protective custody with the team while they look for the person targeting Abby, who appears to be a stalker. It was discovered that the defendant in the trial had used some of the ill-gotten money to hire a hit man to target Abby. It was Abby, who had been armed with pepper spray, brass knuckles and a taser gun, who had subdued the hit man, and helped to get the defendant arrested.|||They also did an Abby-Stalker episode on NCIS-LA, but no one realized until it was too late that she was being stalked by a killer she was hunting.