On NCIS Season 12 Episode 20, Marine Lance Corporal David Austin is found dead after a motorcyle accident. Ducky later determines he was shot just before the accident.

Zoe Keates joins up with the NCIS team after it is discovered that the gun used to shoot Austin came from a failed ATF operation entitled "Fast and Furious". The operation was set up to track illegal guns to the Mexican drug cartel....only most of the guns went missing.

Meanwhile, Tony Senior comes to town, presumably to meet Zoe. As usual however, he manages to cause no end of problems for his son.

Worse, Tony gets into hot water with Zoe after he lies to her and then later blurts out something she overhears.

What did Tony say? How does he go about fixing it?

What's Tony Senior's real reason for his visit?

How does the failed ATF operation factor into the murder of the Marine?

Find out the answers to all of these questions and more when you watch NCIS online.