A Golf Course Murder Leaves NCIS Looking For A Missing Link

We'll also learn about Sloane's secret past work in "Trapped."

The latest installment of NCIS is anything but par for the course for the team, when a petty officer is found murdered on the green of a golf club.

WATCH: Preview Of "Trapped" (Episode 6, Season 15 of NCIS)

In the brand-new episode entitled "Trapped"—which airs Tuesday, Oct. 31 at 8/7c on CBS and CBS All Access— McGee ( Sean Murray) spends hours on the victim's ham radio trying to locate a key witness.

Also, the truth will surface about Special Agent Jacqueline "Jack" Sloane's (Maria Bello) previous work in psychological warfare.

Meanwhile, Palmer ( Brian Dietzen) asks his coworkers to donate to a charity that builds playgrounds for kids of all abilities, and Torres ( Wilmer Valderrama) surprises everyone with his generosity.

Will McGee get to the bottom of his mysterious lead? Will Sloane's past haunt her?

STREAM: Full Episodes Of NCIS On CBS All Access

Watch all-new episodes of NCIS on Tuesdays at 8/7c on CBS and CBS All Access.