The Flash: Amanda Pays Shares the Screen With the Scarlet Speedster Again as "The Reverse-Flash Returns"

The CW has released teaser photos for this week's episode of The Flash.

Titled "The Reverse-Flash Returns" and featuring a guest appearance by Amanda Pays as Tina McGee, the scientist whose role she originated on 1990's The Flash, the episode brings back Matthew Letscher as Eobard Thawne, the Reverse-Flash.

How is he back after he was removed from existence at the end of last season? That's the burning question.

You can check out the preview photos and episode synopsis below.

HE'S BACK -- When Cisco (Carlos Valdes) gets a vibe of Eobard Thawne (guest star Matthew Letscher), Barry (Grant Gustin) and the team don't believe it. But, after an attack at Mercury Labs, Christina McGee (guest star Amanda Pays) confirms that the Reverse Flash is back. Meanwhile, Iris (Candice Patton) and Francine (guest star Vanessa A. Williams) share a nice moment that brings Iris closer to her brother, Wally (Keiynan Lonsdale). Michael Allowitz directed the episode written by Aaron Helbing & Todd Helbing (#211). Original airdate 1/26/2016.

The Flash airs on Tuesdays at 8 p.m. ET/PT on The CW.