Watch Bleach - 004 Info

: This episode is most famous for the scene where several Captains—including Byakuya Kuchiki and Toshiro Hitsugaya—attempt to use their Bankai, only to have them stolen by the Sternritters using "Medallions".

In the modern Thousand-Year Blood War revival, Episode 4 marks a turning point in the war against the Quincies.

: Chad, who is normally a pacifist, gets injured trying to protect the bird. It is later revealed that the parakeet contains the soul of a young boy named Yuichi, who is being hunted by a Hollow named Shrieker.

: The Wandenreich's invasion of the Soul Society intensifies. Within seven minutes, over 1,000 Soul Reapers are killed by just 16 enemies.

Cour 4 is the final part of the Thousand-Year Blood War arc, scheduled to premiere in . What new scenes will be added in cour 4? - Facebook

: The anime added extended fight choreography for characters like Renji and Byakuya that was not fully depicted in the manga. Bleach: TYBW (Cour 4) - " The Calamity " (Upcoming)

Depending on which series or "Cour" you are referring to, covers vastly different parts of the story. Bleach (Original Series) - Episode 4: " Cursed Parakeet "