David Boreanaz, who directed Part 1 of the two-hour premiere, the episodes kick off a new chapter for Jason and the team, and may bring about significant change. «We had to maintain a sense of where we were back in March, when we didn't finish the last two episodes of season 3. Because of that shutdown, we were pushed to use that as our season premiere for season 4, that was the biggest shift as far as a big pivot was concerned,» Boreanaz tells ET.