In Big Brother Binky, Binky's family adopts a baby girl from China. Binky goes through many emotions including excitement and frustration, including jealousy (with the adoption process and bonding with his new sister). This is a wonderful episode to show to children who have or are waiting for an adopted sibling. Told from the point of view of the sibling.
Buddy decides he wants to learn more about what it means to be a theropod. His family, including his parents are siblings, are pteranodons, and they are incredibly supportive of Buddy, accompanying him to a theropod convention. This episode beautifully demonstrates what transracial adoptive parents should do to support their children. Told from the point of view of the adoptee.
Becky (aka Word Girl, a superhero) recounts her adoption story to her dad and brother. (Jump to minute 5:45 if you wish to see just the adoption segment of this episode.) Told from the point of view of the adoptee.
Which episodes would you add to the list?