after Casey has explained about the story with the kraang and the key, the turtles, Casey, April and splinter made their way to the hidden spot of the foot clan. Soon they managed to find it but they were a bit too late. The foot member has already opened the portal for the kraang to come, as Casey saw this he yelled out in panic.

Casey:"no! It has begun. We need to grab the key!"

leo’s stepped forward creating a portal with his blue ōdachi's twin katanas to keep Casey safe.

Leo:"go Casey, we watch your back!"

but the kraang already came out, first the leader stepped out, his sister and least his brother.

Kraang leader:"finally we’re free from the prison dimension."

Raph then stepped towards them next before he could lunge at them.

Raph:"welcome on the earth I wish you NO great day!"

the kraang sister managed somehow to slam Raph into a wall.

but soon the real war has started, Mikey and donnie already give their best to stop them but end up by getting captured in their grip not being able to fight back. Leo has seen that but was unsure what to do since he could only watch with his blue ōdachi’s twin katanas tightened in both of his hands with a strong grip on them.

Splinter got hurt in front of Raph’s eyes, his eyes were wide in shock as he saw their dad injured. He looked back at the team.

Raph:"Re-treat!"

Leo:"Re-treat? That’s not existing by us!"

Raph:"Leo just listen to me for once, they are to powerful and dad is injured!"

Casey:"but the key-!"

Leo:"Raph…"

Raph:"I’m not discussing with you Leo! Donnie escape pots now!"

Donnie:"no need to tell me twice!" donnie swiped a tracker away and taps with his finger on the emergency button, soon as the pots came flying out they locked everyone up in a little escape room and bringing all of them back safe into the lair.

but Leo as always was to prideful and stubborn, he left his own pot to grab the kraang key, and so he did grabbed but the kraang sister was about to charge towards him, as Raph got in her way. I mean he’s not injured but a part of his shell and plastron broke when he sacrificed himself to protect his littler brother what caused Leo to panic with wide shocked eyes. Raph placed his own pot on Leo’s chest so he could go back safe to the lair. Leo didn’t want to have this all true because it traumatized him that his older brother took sacrifice but survived, he banged against the glass of the pot begging for coming back to Raph and help him.

later everyone is back in the lair safe and sound. Mikey was too scared about what just happened and got confused before he held onto Casey.

April:"anybody hurt?"

Mikey:"how did we got here-?!"

Donnie:" Donnie pots, we never had to use those before. So how would everyone rate their escape experience? Very satisfying, very, very satisfying, extremely satisfie-…"

but April cuts him off, to make sure how serious the whole situation was.

April:"DONNIE!"

Donnie:"sorry, sorry… data collection calms me down…"

Casey: "this is just terrible why did we leave?!"

Mikey:"in case you didn’t notice, we got our butts kicked!"

Casey:"but my mission was to stop them! Right now the kraang are using that key to bring something that would distroy the world… we’re lost."