Sometimes it’s good not to fast-forward through the credits roll. You never know what you’ll find.

So the other evening, when the credits came up for episode nine of this season’s “House of Cards,” this popped up: “Consultant: TONY BLINKEN.”

Whoa! As in the deputy secretary of state and former White House deputy national security adviser? That’s some pretty heavy-duty consulting power. Is Blinken moonlighting for Kevin Spacey?

Well, not exactly.

Blinken, a modest sort, said in an e-mail that “‘consultant’ vastly overstated” his role, which amounted to a “few phone calls” perhaps nine months to a year ago. That would have been when he was working in the White House. The calls came from head series writer Beau Willimon and some other writers for the show who wanted to “test the veracity or not of some foreign policy story lines.”

“At this point, I don’t remember the details or the issues” involved, Blinken said. And, no, he wasn’t paid for the advice. Probably a good thing, because the episode — one of the “Putin segments” — for which he got the credit line involves, even for the “House of Cards,” a wildly implausible shootout in the Jordan River Valley. (We’re not going to say more.)

And, yes, Blinken and wife Evan Ryan, the assistant secretary of state for educational and cultural affairs, are binge-watchers.