Enter Matt Ryan, reprising his titular role from NBCsshort-livedConstantine.
But Laurel (Katie Cassidy) and Diggle (David Ramsey) are a different story.
They have little choice once Oliver discovers that Sara has been resurrected.

Credit: Cate Cameron/ The CW
He has an interesting reaction, Mericle says.
He finds out in a very dynamic and interesting way in action.
He did not see that coming.
Laurels been keeping this very much under wraps.
Hes worried for the safety of the city and for Saras safety as well.
As he should be.
In this case, its Thea, whom Sara will target in Wednesdays episode.
It gets scary, Mericle says.
Obviously Oliver knows that and is very concerned.
When that starts to happen, it escalates.
It makes for a really cool scene between him and Laurel, Mericle continues.
But getting Saras soul back wont be an easy feat.
What we typically do in our Act 5 sequence, we have a lot of action, Mericle says.
This is a different way of doing that.
Constantine takes them to a different place, they fight, and they get her soul back.
Its a pretty cool, interesting, very different sequence for us on the show.
One hint: The photo above is deceiving.
Arrowairs Wednesdays at 8 p.m.
ET on The CW.