NCIS: Los Angeles - Season 3 Episode 24 -

part1 - A driver causes a wreck and shoots to death the second driver; a third one blows away the first; SA Renko of the NCIS is an undercover worker of the gun shop where the first two men worked; the team find the bad guy behind it. part2 - The Chameleon says that he'll walk; he tells about Renko and the Mayfield family; he demands an exchange of himself for an abducted NSA analyst; Granger cuts him loose, and the team escort him to the swap, but G takes action.