|“It has arrived, brother. Did you not you hear me? The next Time Blade has arrived.”|
|— Krux to Acronix about the arrival of the Slow-Mo Time Blade|
|"A Line in the Sand"|
|Season 7, Episode 5|
|Air date||May 19, 2017|
|Written by||Adam Beechen|
|Directed by||Trylle Vilstrup|
While the Ninja fight to save MegaMonster [sic] Amusement Park, Jay struggles to defend his family's home from the Vermillion Warriors. But the arrival of the Emerald [sic] Time Blade, with its ability to slow time, leads to a desert chase as our heroes try to reach the Blade before the snakes get it!
The Ninja arrive at the Amusement Park to battle the Vermillion and Lloyd takes charge. Lloyd orders Cole and Zane to get to the roller coaster while the others split up to save the citizens. The Ninja gets outnumbered and finally realize Jay is missing.
Meanwhile, Jay is on his way to the Junkyard and finds out his parents are in trouble.
- Acronix - Ian Hanlin
- Blunck - Brian Dobson
- Cole - Kirby Morrow
- Cyrus Borg - Lee Tockar
- Ed Walker - Colin Murdock
- Edna Walker - Jillian Michaels
- Jay - Michael Adamthwaite
- Kai - Vincent Tong
- Krux - Michael Daingerfield
- Lloyd Garmadon - Jillian Michaels
- Machia - Kathleen Barr
- Nya - Kelly Metzger
- Raggmunk - Michael Adamthwaite
- In the start, when Nya knocks an enemy off a ferris wheel, the "Wilhelm scream" sound effect is used.
- Wu doesn't appear in this episode at all.
- The name of this episode comes from the phrase "line in the sand."
- This phrase means a point from which one cannot turn back.
- Footage from the battle in the desert was used in the music video for the Temporal Whip.
- When Edna is kidnapped by the Vermillion Warriors, and the warriors at Mega Monster Amusement Park retreat to find the next Time Blade, part of the score of "The Memory Switch" is used.
- When Jay first drove into the time bubble and looked at the rest of the Ninja, another Jay can be seen, who was actually supposed to be Cole.
- The official description erroneously describes the Blue Slow-Mo Time Blade as the Emerald Time Blade. This also happens in the next episode, "The Attack."