Battlestar Galactica, Season 1

[during the argument in the lab]

Adama:
[to Tigh, who just walked in with Ellen] I was afraid she might be a Cylon, so I brought her blood over here to have it tested.

Tigh:
That's why you cancelled your test.

Adama:
How'd you know about that?

Tigh:
[doesn't answer; to Roslin] You didn't tell me he was testing my wife.

Adama:
[stares at Tigh] ...You met with the President?

Tigh:
Yes! She thought you might be a Cylon!

[Beat. Then both Adama and Tigh look toward Roslin.]

Adama:
[to Tigh] I know.