The third episode of the new season of NCIS will hit TV screens tonight, Oct. 6, and during this episode Timothy McGee (Sean Murray) and Eleanor "Ellie" Bishop (Emily Wickersham) will go undercover as Tony DiNozzo (Michael Weatherly) searches for family.

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McGee and Bishop will go undercover through orders from Gibbs (Mark Harmon) after a Marine is found dead in Quantico hours after speaking to Gibbs.

The NCIS YouTube channel has shared three sneak peeks to hold fans over until the episode, which is called "Incognito," airs tonight.

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In the first sneak peek video, which is below, Bishop and McGee are assuming their undercover identities as a married couple and they're interacting a bit with the couple they have to run surveillance on.

Once inside, Bishop and McGee actually bicker like a married couple and then watch the couple across the street they're running surveillance on.

"They sure don't look like murderers," McGee states as he and Bishop watch the couple play-fight while washing their car.

In the second sneak peek, it seems as though the seeds are being planted for the latest marital issues between Bishop and her husband Jake Malloy (Jamie Bamber). Previously, it has been teased that Bishop will have plenty of marriage woes with Jake in this season.

Anyway, Bishop opens up to McGee in the clip below about he relationship with Jake.

"Jake and I could use a little alone time," Bishop reveals, adding, "A beautiful white sandy beach, drinks with little umbrellas will hopefully stimulate conversation."

"Relationships take work," McGee shares in understanding.

McGee will be thrown off when Bishop reveals Tony told her he was having a bit of a rough time with his relationship with Zoe (Marisol Nichols).

Then Tony will arrive by their desks and be overly chipper as he dishes about his DNA testing so he can learn about his ancestry.

The usual nonsense will occur and Tony will even use a British accent since he thinks he might be related to British royalty, which will earn a snide remark from Gibbs.

"Keep talking with that accent, I'm going to shoot ya," Gibbs tells him.

In the final sneak peek that's below, McGee and Bishop will be on scene of their murdered Marine and talking about the possibility of Tony being a descendant of royalty.

"You realize if Tony finds out he has an ounce of royal blood running through his veins there will be no living with him," Bishop dishes with McGee adding, "There's no living with him now."

Also in this sneak peek, Tony and Gibbs will be with the body and Dr. Donald "Ducky" Mallard (David McCallum) will give them some insight about when and how their dead Marine died.

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

Tags: NCIS television CBS