With the help of Lucius Fox and Alfred, Batman successfully activates the satellites, causing the Joining’s ships to crash and shutting down the invasion for good. Key Characters & Cast Voice Actor Bruce Wayne / Batman Rino Romano Dick Grayson / Robin Evan Sabara Barbara Gordon / Batgirl Danielle Judovits Alfred Pennyworth Alastair Duncan Martian Manhunter Dorian Harewood Lucius Fox Louis Gossett Jr. Major Impact & Trivia
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. With the help of Lucius Fox and Alfred,
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 . " The Joining: Part 2 " is the