While Billy was a "bad boy" in their youth, he is now reformed and owns a market in Philadelphia, highlighting a "Thick as Thieves" bond that transcends their different life paths. Key Scenes and Highlights
Provides significant insight into Alden Parker's history and personality before he joined the FBI/NCIS. [S19E15] Thick as Thieves
NCIS investigates the murder of Navy Petty Officer Danna Calley, a "possum-loving" sailor found dead in Philadelphia. While Billy was a "bad boy" in their
The team works in Philadelphia, providing a change of scenery from the usual DC backdrop. [S19E15] Thick as Thieves