There was a birthday party going on for one of Alex's classmates named Henry, and of course, Alex was invited.

The party was at Henry's house (of course), kids were running around while their parents chatting with one another, or whatever. Walden was leaning against the wall with his wife, Julie, standing next to him while their daughter, Ophelia, was near the door, waiting for her best friend (Alex, and his dad too) to arrive. (Disclaimer: Walden, Julie, and Ophelia never met Alex dad)