Walter and Nina talk about a case at the Massive Dynamic lab in this image. It's courtesy of the episode "6B."
Walter and Peter are seen here in a scene from "6B." It's the 2/18/11 episode of Fringe.
Walter has cooked up breakfast for Peter and Olivia. But it may take more than this for them to repair their relationship.

Fringe Season 3 Episode 14 Quotes

Peter: I've seen what the two of us together looks like, and it's beautiful.
Olivia: Peter, she's the one who took it away from us, not me.
Peter: And now? Who's the one stopping us now?

Peter: He wants us to spend time together.
Olivia: The three of us? (the song Feelings plays in the background)
Peter: No, just the two.