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.
| Creator | Geoff Johns |
|---|---|
| Actor | Grant Gustin, Candice Patton, Danielle Panabaker |
| Country | United States of America |
| Production | Warner Bros. Television |