"DC's Legends of Tomorrow" will explore the past of one of its members, Heatwave (Dominic Purcell). The show has cast Mitchell Kummen to play the younger version of Mick Rory a.k.a. Heatwave, AceShowbiz reports citing Variety.

The young Mick Rory is described as "a confused teenager whose love of fire becomes lethal." He will make his debut in the 12th episode titled "Last Refuge" that will air April 21 on The CW.

It's currently unknown if the young Mick Rory will appear in flashback or if the team will travel back to the time when Heatwave is still a teenager. Chris Fedak and Matthew Maala write the episode, while Rachel Talalay directs it.

"DC's Legends of Tomorrow" airs Thursdays at 8/7c on The CW.