The wait is over! Episode 6 of "The Flash" Season 2, Tuesday's "Enter Zoom," will finally pit Barry (Grant Gustin) against his Earth 2 speedster arch nemesis -- Zoom (Tony Todd). However, a sneak peek video for the episode reveals that Barry will have to go through another meta-human foe first. Dr. Light (Malese Jow), whom Barry quarreled with in episode 5, is back again and she wants a piece of the Flash. 

In the sneak peek video, Barry battles with the formidable Dr. Light -- but things are not going well! The Earth 2 meta-human is making quick work of the Flash and soon has him pinned and helpless. Will Barry even survive to get a shot at facing Zoom?

Watch the sneak peek video for Season 2, episode 6 below:

However, that sneak peek video does not quite make sense. Didn't Barry lock Dr. Light up in S.T.A.R. Labs in episode 5? Well, the truth is that it is not Dr. Light at all, but her Earth 1 Doppelganger, Linda Park (Malese Jow). It is all part of Barry's plan to trap Zoom.

According to the synopsis, Iris (Candice Patton) thinks that Linda Park is the perfect secret weapon to lure Zoom to Earth 1. Since Dr. Light is gone and Linda Park looks, well, exactly like her meta-human Doppelganger, Barry and Iris figure if they stage things to make it look like Dr. Light has killed the Flash, Zoom might show up to investigate, allowing them to spring a trap. 

The promo for the episode reveals that training Linda to use Dr. Light's suit and fake superhero powers is not the easiest task.

"Maybe if she did not scream every time she fired," Earth 2 Dr. Wells (Tom Cavanagh) chides.

Watch the promo for Season 2, episode 6 below:

Well, it seems that eventually Linda will figure it out. She is doing a pretty convincing job in the sneak peek.

Will the plan work? What will happen when Zoom meets the Flash? Fans will have to tune in to find out. "The Flash" airs Tuesdays at 8 p.m. EST on the CW.