This is the first episode in which Tickled Pink talks (it might be the only one). She's the girl in pink that tries to get through the Color Castle doors with the buckets of water, and ends up going backwards.
Throughout the entire episode, Rainbow Brite's side ponytail keeps switching sides.
This episode also shows Stormy on her black horse, although she is never named. In the scene where the kids scatter to avoid the crashing ship, she can be seen leaving, near Indigo.
This episode seems to show very briefly the pink color kid, Tickled Pink. You see her when the color kids run out of the castle and look around, after it cuts to Murky asking what's happening as the space ship collides. When it cuts back the kids, she is visible on the right of the screen.
At the very end of the episode, Murky and Lurky blast a gloom cloud at Brian to get into the Color Castle. Then Lurky runs and grabs him while Murky goes inside to get Rainbow. You see Lurky holding Brian in the doorway and Brian is making muffled sounds, like he can't yell because his mouth is covered…but it isn't.
When Wisp first sees the other Color Kids calling to her in the form of bubbles, Indigo is shown as being Caucasian, when she is in fact Indian.
This episode marks the first time Wisp is called Rainbow Brite. A purple star appears on her left cheek to symbolize her status as protector of Rainbowland.
When Murky kidnapped three color kids, we intitally see La La Orange, Buddy Blue and Indigo. Then when Wisp rescues them, Buddy Blue is gone and we see Patty O' Green. Wisp already had rescued her before, she left her at the Color Cave with Red Butler and Canary Yellow.