Why did Cowboy Bebop only air 12 episodes at first?
Cowboy Bebop premiered on TV Tokyo on April 3, 1998, in a 6 PM slot, carrying gunplay, drugs, syndicate murders and a body count. The run that followed was a selection, not a season: by the time it ended on June 26, TV Tokyo had aired only twelve episodes, sessions 2, 3, 7 through 15 and 18, plus a special, and the series simply stopped.
The special is the tell. Session XX, "Mish-Mash Blues," is a clip compilation the staff assembled as the run collapsed, and it signs off with the crew's message to the audience: "This is not the end. You will see the real Cowboy Bebop someday!" The context, in anime historian Jonathan Clements' account, was a censorious climate: Neon Genesis Evangelion had redrawn what television anime could show, a series of prominent media-violence incidents had made TV Tokyo jumpy about racy content, and broadcasting standards tightened around exactly the kind of show Bebop was. The cancellation was not about ratings; network stakeholders objected to the content.
The rescue came from satellite. WOWOW aired the complete series, all 26 sessions in order and uncut, from October 24, 1998 to April 24, 1999. That complete edition is the Cowboy Bebop the world inherited, the Seiun Award winner and the Adult Swim cornerstone. The most influential anime of its era was, in its home country, a show its first network would only half broadcast.
THE SHOW THEY HALF-AIRED
Sessions 1 to 26