Mark Simich

After the U.S. Treasury Department is hacked, Nell and Eric go undercover inside a couple's retreat to track a tech-savvy husband and wife linked to the crime. Also, Digital Forensics Specialist Dave Flynn (Scott Grimes) arrives from the NCIS cyber office in San Diego to run ops while Eric and Nell are on assignment. Bar Paly guest stars.

Lindsay, Stella, and Flack investigate a man who died when his cigar exploded; Danny finds out that someone he knows was killed during a robbery.