“- Peter: Oh, God. I don't believe this. I'm a member of Greenpeace and I just helped poison a dog.
- Sully: Well for one thing, it ain't poison. For another, you didn't help much.”
Dylan Walsh - Peter
Paul Newman - Sully

“We've just discovered the most wonderful, the most marvelous poisinous gas. It will kill everybody.”
Billy Gilbert - Herring

“Poison is a woman's weapon.”
Steven Geray - Dr. Retling

“- Mortimer Brewster: How can I believe you? There are twelve men down in the cellar and you admit you poisoned them.
- Abby Brewster: Yes, I did. But you don't think I'd stoop to telling a fib.”
Cary Grant - Mortimer Brewster
Josephine Hull - Abby Brewster

“- Abby Brewster: The gentleman died because he drank some wine with poison in it.
- Mortimer Brewster: How did the poison get in the wine?
- Martha Brewster: We put in wine because it's less noticeable. When it's in tea it has a distinct odor.”
Josephine Hull - Abby Brewster
Cary Grant - Mortimer Brewster
Jean Adair - Martha Brewster