‘The Flash’ spoilers: See first photo from Katie Cassidy crossover!

You have probably seen at least one variation on a trailer for “The Flash” so far that features Katie Cassidy in it somewhere, as Cisco Ramon is going to have quite a field day with learning that Laurel Lance is the Black Canary. Basically, he is president of the fan club. Now, we have the first photo!

So why exactly are two characters meeting up? They are going to do so in the April 21 episode entitled “Who Is Harrison Wells,” and the idea here is that Laurel is apparently going to be asking Cisco for some sort of favor while he is in town. We can imagine that there are many problems that she is suffering from at the moment, which include Ra’s al Ghul and his empire, issues with her dad, and also the sole fact that something terrible always seems to be happening in Starling City (which is where this photo is from).

This episode will also feature a law-enforcement crossover, as Joe West is going to be spending a little bit of time with Captain Quentin Lance as they work together on solving a problem. Hopefully, this means that Lance will be off his whole “destroy the Arrow” crusade by then, and will realize that this massive manhunt is just going to lead to him getting egg on his face.

Also in this episode, Barry Allen and the entire STAR Labs crew are going to be doing battle against a meta-human with the dangerous ability to transform into anyone he touches … and that includes The Flash. At least Barry knows how to use his powers, right?

If you missed it yesterday, we have another great trailer at next week’s return for “The Flash” over at the link here. Check it out! Also, you can sign up here to get some further TV news in a flash, courtesy of our CarterMatt Newsletter. (Photo: The CW.)