Wikimedia Commons/Invincible TV show TV Invincible Season 4 is here! New episodes drop weekly on Prime Video. Mark Grayson faces fresh threats in the acclaimed adult animated series. April 18, 2026 AceShowbiz - Invincible has officially returned to Prime Video with a fresh batch of episodes, thrilling fans of the acclaimed adult animated superhero series. On March 18th, Prime Video released the first three episodes of Season 4, continuing the intense and emotionally charged story that has captivated viewers since its debut.