Stahma Tarr and Datak Tarr in “Doll Parts”

I've just gone to a great deal of trouble to free our son from the lawkeeper's jail.

You're a good mother.

Is that sarcasm?

Oh, if you have to ask, it probably is. So Alak, did he do it?

I think we both know the answer to that.

Do we?

I know you placed the microphone under his bed. What I don't know is why.

What microphone?

Are you seriously trying to tell me you did not kill Deirdre?

Well, actually, I assumed it was you.

Then who - [Stahma realizes, and breaks into laughter]