6:02 AM EST - S3-E20
Continuity mistake: This is after Olivia has bumped into Walter in the hallway. She gets back into bed and tells Peter that his father is walking around the house naked. Peter laughs and says it's normal for a Tuesday. The sun is on Peter's left cheek in shots from behind Olivia. In the reverse shots from behind him, the sun is missing. (00:07:30)
Answer: He helped his father evade capture, impeding the investigation.