Catherine Bell's Mac Enlists 'NCIS: LA' to Investigate a Navy Chief (VIDEO)

NCIS Los Angeles Season 11 Episode 22 Code of Conduct
CBS

Catherine Bell returns as Marine Lieutenant Colonel Sarah "Mac" MacKenzie to NCIS: Los Angeles — she was last seen in the Season 11 premiere — and this time, she's the one who needs help.

In the April 26 episode, "Code of Conduct," airing at a special time (10/9c), Mac asks NCIS to help with a sensitive case after two SEALs claim their chief murdered an unarmed prisoner. That sends Sam (LL Cool J), Callen (Chris O'Donnell), and Roundtree (Caleb Castille) to Afghanistan, while, as you can see in the photos below, Kensi (Daniela Ruah) and Deeks (Eric Christian Olsen) work with Mac in L.A.

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Watch the promo for more details about the investigation and to see who might be in serious trouble:

Bell's appearances bookend the season — Episode 22 is the last new one — and could this end up leading to a JAG reboot? "Never say never," executive producer R. Scott Gemmill told TV Insider.

NCIS: Los Angeles, Sunday, 10/9c, CBS

NCIS Los Angeles Season 11 Episode 22 Callen Sam Roundtree Debrief
CBS

What are they dealing with?

NCIS Los Angeles Season 11 Episode 22 Sam Callen Trouble
CBS

This looks like trouble.

Callen Sam Roundtree NCIS Los Angeles Season 11 Episode 22 Tied Up
CBS

“Don’t worry, Roundtree. You probably won’t die here.”

NCIS Los Angeles Season 11 Episode 22 Callen Sam
CBS

Get down?

LL Cool J NCIS Los Angeles Season 11 Episode 22 Sam
Bill Inoshita/CBS

Sam (LL Cool J)

NCIS Los Angeles Season 11 Episode 22 Sam Roundtree Callen
Bill Inoshita/CBS

They surrender?

NCIS Los Angeles Season 11 Episode 22 Kensi Deeks
CBS

Kensi (Daniela Ruah) and Deeks (Eric Christian Olsen) in the boat shed

Daniela Ruah NCIS Los Angeles Season 11 Episode 22 Kensi
CBS

Kensi

Eric Christian Olsen NCIS Los Angeles Season 11 Episode 22 Deeks
CBS

Uh-oh…

NCIS Los Angeles Season 11 Episode 22 Mac Video Ops Densi
CBS

Catherine Bell returns as Mac.

NCIS Los Angeles Season 11 Episode 22 Mac Office Deeks Kensi
CBS

Welcome to OSP, Mac.

Catherine Bell Returns NCIS Los Angeles Season 11 Episode 22 Mac
CBS

Mac is back!

NCIS Los Angeles Season 11 Episode 22 Deeks Mac Kensi
CBS

Deeks, Mac, and Kensi

Densi Mac Ops NCIS Los Angeles Season 11 Episode 22
CBS

Mac joins Deeks and Kensi in Ops.