Babylon 5, Season 5: The Wheel of Fire

[Sheridan and Delenn greet Rebo and Zooty in their quarters, where they have all gathered for dinner. As Delenn and Zooty walk off, Sheridan leans in to talk to Rebo.]

Sheridan:
You know, I was really hoping to talk to Zooty. You know, without the machine.

Rebo:
Yeah. He never breaks character, not even around me. In ten years, I've only heard him say one word without the machine.

Sheridan:
Oh. Oh. What's the word?

Rebo:
Why.

Sheridan:
Oh, just curious.

Rebo:
No, no. That was the word. "Why". In ten years, I haven't figured it out myself.

...

[Later, in the Zocalo, Zooty gestures for Sheridan to lean close. He takes off his hat, puts it over the machine hanging from his pocket, and whispers conspiratorially to Sheridan. Sheridan's eyes go wide, and Zooty nods in confirmation. He dons his hat and walks off. G'Kar runs up to him.]

G'Kar:
What did he say?!

Sheridan:
[astonished] "Because it tells me to…"