NCIS airs a new episode tonight, April 7, called No Good Deed, which guest stars Robert Wagner as Tony DiNozzo's (Michael Weatherly) dad Senior and Marisol Nichols as ATF Agent Zoe Keates, who also happens to be dating Tony.

Watch A Preview Of 'NCIS' Episode 'No Good Deed'

The press release revealed NCIS and ATF will be working together on a case since the weapon used in a NCIS case happens to be from an ATF sting operation called "Operation Cast and Furious."

The NCIS YouTube channel uploaded two sneak peeks Monday night of this episode, which can be viewed below.

'NCIS' Star Emily Wickersham Spreads Awareness About Operation Smile

In the first sneak peek, Timothy McGee (Sean Murray) and Eleanor "Ellie" Bishop (Emily Wickersham) are getting off the elevator at NCIS headquarters to go to their desks and they're talking about McGee's girlfriend Delilah (Margo Harshman).

"Well, relationships take work," Bishop says just as they reach their desks to find an unusually peppy Tony.

Tony greets them with much cheer, which throws them for a loop.

"You're in an abnormally good mood," McGee states, while adding, "What's up?"

That leads to Tony detailing that his father will be visiting and that he'll meet Zoe.

MeGee and Bishop point out that Tony didn't want to meet her parents, but he insists, "Things have changed."

"She and I are in a really good place," he adds as Gibbs (Mark Harmon) comes to get them to go to a crime scene.

In the second clip, Zoe briefs Gibbs and Director Vance (Rocky Carroll) on the aftermath of "Operation Fast and Furious," which revealed there are roughly 1,300 firearms missing, including the one that was used on the Marine that has led to NCIS and ATF working together on this case.

NCIS airs on Tuesdays at 8 p.m. ET on CBS.

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NCIS, Television, CBS