Sometimes, working with family isn't as easy as it seems.

CBS' long-running procedural Blue Bloods returns for its sixth season this week, and ETonline has the exclusive sneak peek from Friday's return featuring a tense face-off between Tom Selleck and Bridget Moynahan.

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Selleck's Frank Reagan, New York City Police Commissioner, is faced with a possible terrorism threat in the city that forces him to make a quick decision about whether to move on a potential lead. His Assistant District Attorney daughter, Erin (Moynahan), is given the thankless task of trying to get him to rethink his position on the matter.

As she quickly discovers, it's harder than it looks!

"What if you raid that apartment, kill three Muslims and don't find a single bomb on-site? That's a lot of backfire that you're standing in front of," Erin tries to reason with her father.

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But Frank isn't having it.

"I'll take that risk," he says, showing her the door.

Awkward!

Blue Bloods premieres Friday, Sept. 25 at 10 p.m. ET/PT on CBS.