The NCIS team investigates a shipwreck carrying exotic animals that now threaten the native wildlife on Oahu. Also, Alex sustains a career-ending injury and Kai asks Melanie, a fish and wildlife agent, out on a date.

Richard searches for a way around Jack. Gilfoyle opens himself up to recruiters. Dinesh draws unwanted attention from a recent purchase.

Owen and the 126 race to emergencies at a fast food drive-thru, a high school wrestling match and a case of road rage – all with one common element tying them together. Meanwhile, Tommy’s estranged brother-in-law makes a surprise appearance in Austin, and Marjan confronts Capt. Strand about his anger management issues.

A transporter malfunction causes Captain Kirk to split into his “good” and “evil” selves, and a landing party will freeze to death if they don’t merge the two back together.

The new and improved Pied Piper impresses Dinesh and Gilfoyle, but worries Richard. Jared and Erlich both face housing issues. Gavin suggests a controversial move.

When an infamous arms dealer, Reymundo Diaz, is released from prison and bodies start piling up, Torres is forced to face the repercussions of his actions during an undercover operation he worked on years ago.

After being unceremoniously fired, an angry Richard faces a tough decision: accept the diminished role of CTO, or leave Pied Piper for good. Erlich takes a shine to Jack Barker, Laurie’s new choice of CEO, while Dinesh and Gilfoyle weigh their options in Richard’s absence. At Hooli, Gavin tries to improve his image by admitting failure, and Big Head gets wind of major changes.

The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.

The Enterprise encounters a vast alien ship that sets out to test them.

A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately.