WhenRiverdalereturns, the small town is in a state of chaos.

EW spoke with showrunner Roberto Aguirre-Sacasa about what to expect from the rest of season 5.

So I appreciate that.

Riverdale

Mark and Michael Consuelos in ‘Riverdale.'.The CW

I’m with you; time jumps can be very weird.

With all of the inmates running around, this first episode back is almost giving me Gotham City vibes.

It’s a classic criminals-running-amok-in-Riverdale kind of thing.

[Laughs] We love bringing those characters back.

Where did the idea for Penelope (Nathalie Boltt) creating her own ministry come from?

If you saw the HBO showPerry Masonthere was a similar character.

That was where the idea came from.

The idea of creating their own ministry felt somehow outlandish and yet very very Blossom-esque.

We saw Josie and the Pussycats in the latest trailer.

What can you say about their return?

I don’t want to spoil it but we’re getting to them sooner rather than later.

It’s wonderful; it was so great to have the girls back.

It’s one of our strongest episodes of the season.

Honestly, it’s all about Mark Consuelos.

Mark joined us in season 2 and he’s been such a terrific addition to the show.

He’s been completely up for being our big bad.

It’s a very off-the-beaten-path episode but we can’t wait for people to see it.

Riverdaleairs Wednesdays at 8 p.m.

ET on the CW.