Warning: This article contains spoilers about Thursday’s episode ofSupernatural.

He wasn’t back for long, but his return still made an impact.

Thefourth episodeofSupernatural’sfinal seasonkicked off with a dreamor was it a vision?of Sam’s.

Atomic Monsters

Credit: Diyah Pera/The CW

In that dream, Dean is seen making his way through the bunker’s hallways killing demon after demon.

“It was just written as a soldier,” Ackles recalls.

“I was like, ‘Can we get a familiar face, somebody that we know?’

Supernatural

Diyah Pera/The CW

So they sent over a couple of names of people from the past.

I think one was Donna or Jody or Bobby.

Then I was like, ‘What about Ty [Olsson]?'”

He was last seen on the show in season 10.

“He was like, ‘I’m in Calgary.

So he came in and literally he was there for a few hours and knocked it out.

It was so cool having him there.

It was like he’d never left.”

Supernaturalairs Thursdays at 8 p.m.

ET on The CW.