What’s that you smell, “Flash” fans? I do believe it’s a whiff of sweet nostalgia. For the dead and buried of DC’s TV universe, time travel is a man’s best friend. Rick Cosnett (Eddie) and Robbie Amell (Ronnie) announced their episode 16 return last month, and, thanks to new set photos, we know a little more about how the deceased heroes will figure back into the storyline. And yes, we are counting Detective Thawne as a hero – super powers or not.

‘The Flash’ turns back the clock?

Although we all thought Flashpoint taught Barry Allen (Grant Gustin) a lesson or two about meddling with the past, it looks like at least one speedster will hit rewind ahead of the “Supergirl”/”Flash” musical.

When the STAR Labs brain trust will come in contact with Eddie Thawne and Ronnie Raymond, the duo will definitely shoulder their old roles.

In the behind-the-scenes photos below, you can see Cosnett and Amell settling in with their old co-stars. While Mr. and Mrs. Raymond are clearly catching up near the cortex, Candice Patton’s (Iris) snap poses a few questions. Gustin is employing “The Flash”’s go-to trick for hiding flashbacks – removing Barry’s emblem. Judging by the detective’s shield poking out from under Cosnett’s jacket, it looks like the team will take a little trip through the speed force.

There are, however, three other possible reasons for a dead friends reunion – a multiverse road trip, a little Vibe (Carlos Valdes) action, or some Savitar trickery.

If the speed god can control who sees him and the Philosopher’s Stone can pull Dante from the grave, then what’s to say Ronnie and Eddie aren’t merely stage dressing for season 3’s big bad?

Next time on ‘The Flash’

Iris’ DOD is still months away, but as much as Team Flash can change the future for the better, so can their enemies.

In “Untouchable,” the journalist will battle her mortality sooner than expected.

“Barry and the team at S.T.A.R. Labs work together to bring down Clive Yorkin (guest star Matthew Kevin Anderson), a criminal meta-human who is methodically killing people by causing them to decompose at an accelerated rate,” The CW teased. “Joe (Jesse L. Martin) becomes his next target but it’s Iris (Candice Patton) who is caught in the crossfire.”

“The Flash” airs Tuesdays at 8 p.m. ET on The CW.