T - The Flash (2014) - Season 1 Episode 15 - Out of Time

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. Meanwhile, Cisco investigates the Reverse-Flash's escape and wonders if Joe is right about Harrison.

Aired: 17 Mar 2015