July 3rd, 2015
- Bansha - Kathleen Barr
- Cole - Kirby Morrow
- Ghoultar - Paul Dobson
- Jay - Michael Adamthwaite
- Kai - Vincent Tong
- Misako - Kathleen Barr
- Morro - Andrew Francis
- Nya - Kelly Metzger
- P.I.X.A.L. - Jennifer Hayward
- Ronin - Brian Dobson
- Sensei Wu - Paul Dobson
- Soul Archer - Brian Dobson
- Zane - Brent Miller
- When Morro watches the Ninja ascend into the Blind Man's Eye, he is wearing the Allied Armor of Azure, despite it being destroyed in the previous episode.
- When Bansha and Soul Archer observe that Morro didn't make it, Bansha says Soul Archer's line and vice versa.
- For a split second in the avalanche scene, Cole is wearing Deepstone shoulderpads, despite being turned into a ghost.
- This is the first episode where the Ninja (except for Cole) wear their Deepstone armor.
- This is the first episode where all of the Ninjas' mechs were featured not only in the same episode, but also in the same scene. Kai's Fire Mech, Cole's Earth Mech, Jay's Electro Mech, and Zane's Titan Mech all appear as they climb the Wailing Alps. Nya's Samurai Mech also appears, but only in its transformed Ghost Mech form.
- This is the first episode where Nya wears her new Ninja outfit, although she doesn't have the mask on.
- This episode continues with the subplot set up in "Stiix and Stones," regarding Zane's damage voice. In this episode, Jay programed a pirate voice into Zane, just for his own amusment.
- This is the second time Nya has mentioned that she likes the color blue, the first being in "Weapons of Destiny" - one of the first episodes in the series.
- The title's name is a pun on "peek-a-boo."
- The "Don't have a cow" gag from The Simpsons is referenced in the walliper scene: Jay calls the walliper a cow, Kai says his own version of Bart's line i.e, "I'm about to have a cow."