Q: Well, there's one storyline they really have to keep straight—the mystery of the show's title. Will we be getting any more mother clues soon?
A: We shot the season finale already because Alyson [Hannigan, who plays Lily] is on maternity leave. There's some stuff that's revealed in the finale. It's always such an awkward thing when talking to the press about it because when we find out who the mother is, the show will be done. People who I meet on the street are like: "I love your show. Who's the mother? You've got to tell me!" and I'm like "Dude, I don't even know what we're shooting next week!" I wouldn't be surprised if they did an ending where I was the mother or someone else was that people had been guessing. Or it could be a totally new person.