Look for a very young Ryan O'Neal who has a small role in this episode. Many years before he became famous.
In the opening credits, when June brings out a tray of drinks to Ward and the boys, the front door opens and closes without her ever touching it. Since the other three family members are already outside working, it's unknown who would have gotten the door for her.
The opening credits have changed showing June coming out the front door, offering drinks to Ward, Wally and Beaver who are doing yard work.