Chris Wood's Mon-El will return for Supergirl's 100th episode. 1 / 14
New photos from TVLine reveal Mon-El's reunion with the Super Friends at the Watchtower. 2 / 14
He stands with Winn Schott, Alex Danvers, Kelly Olsen and J'onn... 3 / 14
...in front of Supergirl and Thomas Lennon's Mr. Mxyzptlk. 4 / 14
The 100th episode, titled "It's Super Life," will see Mxyzptlk offer the opportunity of a lifetime: 5 / 14
...the chance to confess her secret identity to Lena Luthor before she finds out from Lex. 6 / 14
This will trigger a series of events that will highlight major moments from the series so far... 7 / 14
...and make Kara weigh her chance at redemption against the greater good. 8 / 14
It looks like this will also somehow bring Mon-El back into the Super Friends fold, among others. 9 / 14
Wood's Mon-El played a major role across Seasons 2 and 3. 10 / 14
In addition to acting as Kara's love interest, he paved the way for the Legion of Super-Heroes. 11 / 14
He last appeared in "Battles Won and Lost," the Season 3 finale... 12 / 14
...where he returned to the future with his wife and Winn. 13 / 14
Supergirl airs Sundays at 9 p.m. ET/PT on The CW. 14 / 14