A not-so-happy ending to the episode 'Scrapheap.'

Arcee isn't sure if there's such thing as hallucinations in a frozen environment when she onlines her optics, or...
"Welcome to the Well of AllSparks," Tailgate announces, "well, ok, death isn't cheerful, but it's good to see you again, partner."
"Death?!" Arcee exclaims.
"I'm sorry," Cliffjumper sadly says.
Arcee and Prime know they're not dreaming.
They tear up, knowing the pain their friends will feel.
"I've already felt the pain they'll feel twice,"' Arcee sobs.
Her two former partners hug her as she cries.

"Keep them busy; I'm almost done," Ratchet tells the others as he repairs the ground bridge.
The kids try their best to keep the scraplets from eating their friends. Bulkhead and Bumblebee help the best they can while injured.

Ten minutes pass before Ratchet finally gets the ground bridge working.
"We need something to get them to want to go through the ground bridge," Jack points out.
"Come here, scraplets!" Bulkhead yells as he gets up, "nice meal right here."
He runs as fast as his injured body lets him through the ground bridge, falling onto the snow. The scraplets freeze, but Bullhead doesn't see Arcee or Prime. Ratchet tells him to return.

Once Ratchet repairs himself, his scabs confirm the dreaded news
"Arcee and Optimus are one with the AllSpark," he informs the others
"If we weren't dealing with scraplets who are everything, we could have gotten them home!" Bulkhead rages.
"There's nothing we can do —."
Ratchet is interrupted by Miko's screaming.
"Spider!" She screams and runs away.
"Did she just scream like a little girl?" Bulkhead asks.
This distraction doesn't last long. Everyone questions what's next?