[s4e13] The Joining: Part 2 File

During the invasion, even Gotham's villains—including The Joker, Penguin, Bane, and Mr. Freeze —fight alongside the GCPD to defend their city.

Batman and J'onn attempt to infiltrate Wayne Industries to use its satellites to disrupt the Joining's signal. [S4E13] The Joining: Part 2

" The Joining: Part 2 " is the season finale of The Batman (2004) Season 4, originally airing on May 5, 2007. The episode concludes the high-stakes alien invasion arc and marks Batman's official transition from a solo vigilante to a member of the Justice League. " The Joining: Part 2 " is the

Encouraged by Alfred, Batgirl and Robin disobey Batman’s orders to stay behind and join the fight, eventually holding off robots while Batman hacks the system. The episode ends with Batman joining J'onn on

The episode ends with Batman joining J'onn on the Watchtower space station, where he meets other heroes: Green Lantern, The Flash, Hawkman, and Green Arrow .