Stephen Wozniak

When Sam and Callen receive a cellphone, the caller threatens innocent lives if his instructions are not followed.

When an undercover NCIS agent is suspected of working for the smuggler he's supposed to be investigating, the team takes him into custody to find his true intentions.

Shore leave on the pleasure planet Risa leaves the crew in various states of disarray; Phlox is awakened from his annual 48-hour hibernation to treat an injured crew member.