NCIS will enter season 14 with an ominous cloud hanging over its head. The first three episode titles are in, and they have viewers around the world biting their nails.

The exit of Michael Weatherly's Tony DiNozzo has opened the field for fresh blood, and CBS has seized the opportunity with both hands. Prepare to meet Special Agent Alexandra "Alex" Quinn (Jennifer Esposito), a former field agent who Gibbs (Mark Harmon) will pull back into the fray; MI6 Officer Clayton Reeves (Duane Henry), who made his debut in season 13's finale episodes; and Nick (Wilmer Valderrama), and agent who emerges from years of deep cover to become a "charismatic loose cannon" on Gibbs' team.

It is Valderrama's agent we're worried about the most, however, particularly considering the following titles from Spoiler TV:

Episode 1: "Rogue"

Episode 2: "Being Bad"

Episode 3: "Privileged Information"

Is Nick the eponymous rogue? Will his past cause chaos for our heroes? Valderrama gave fans a little teaser while speaking at San Diego Comic-Con.

"We've already gotten into each other's faces in one of the scenes," the actor said of his character's dynamic with Gibbs. "I can't tell you much about it, but Gibbs and I are butting heads already. There's something that's going to happen, but we already have like a little father/son kind of thing. I'm the black sheep of the family so far."

Are you ready to enter the post-Tony world? Find out more when Abby (Pauley Perrette), McGee (Sean Murray), Ducky (David McCallum), Ellie (Emily Wickersham), and Gibbs return to CBS on Sept 20 at 8 p.m. ET.