Get ready for the monumental Viltrumite War as ‘Invincible’ Season Four premieres on March 18, 2026, exclusively on Prime Video. Eye-popping new clips reveal the daunting challenges Mark Grayson faces while defending his home from cataclysmic threats. After an unprecedented viewership and a slew of accolades, this beloved animated series is set to deliver an unforgettable continuation of its storyline.