Journey In The Spring (1) - S3-E6
Revealing mistake: When Charles notices that his dad set the house on fire, and he is at his mom's wooden grave site, the wooden grave marker moves when he gets up to save his Pa from the burning house.
Revealing mistake: When Anna (little girl who stutters) is crying after being teased, the "tears" on her cheek are obviously fake. They never run or move. I'm guessing rubber cement.