Wikimedia Commons/The Legend of Vox Machina TV The Legend of Vox Machina returns for season 4 on Prime Video June 3, 2026. Watch the trailer as the adventurers reunite to face The Whispered One. April 24, 2026 AceShowbiz - The Legend of Vox Machina is gearing up for its much-anticipated return with the release of the official trailer for season 4 on Prime Video. The animated fantasy series, adapted from the first campaign of the web series Critical Role, has been a standout success for the streaming platform, earning a perfect 100% approval rating from critics across its initial three seasons.