Mark Mardon, having survived his apparent death during the black-matter explosion, returns seeking revenge on Joe for the death of his brother Clyde and has the same weather-manipulation powers as his deceased sibling.

The Flash is back and it’s all about revelations in what might be the best episode so far of the season. Tonight felt like it should have been a season finale, but we’re not even close to that.

There’s revelations about Harrison, Barry’s relationship with Iris is move forward, and there’s something that happens to Cisco that had my jaw drop. How good was the episode? The person I was watching it with actually asked if it was the last episode of the season and was shocked when I said no.All of that goes on, plus there’s the introduction of a new Weather Wizard too!This is an episode that you just have to watch, because saying more would truly ruin the excitement. But here’s what we learn:

• The truth about Harrison Wells, including his name and why he’s doing what he’s doing
• There’s a big reveal of The Flash’s identity to someone
• Barry and Iris have an important moment
• Something happens to Cisco
• There’s a new Weather Wizard!

All that, and it happens in an hour!!!

Overall rating: 9.5