As of July 2026, B: The Beginning is a Action & Adventure series that aired since 2018 with 2 seasons — streaming now on Netflix. Find out where to watch it below.
B: The Beginning poster

B: The Beginning

2018–2021 2 Seasons 18 Episodes Action & Adventure MA 15+ ⭐ 8 / 10

Right now you can watch B: The Beginning in Australia on Netflix, and in the US on Netflix — and it goes further with its ideas than most genre entertainment bothers to. Across 2 seasons, the show has had time to find its rhythm and keep it. 184 people have weighed in on TMDB, and the verdict leans heavily positive. Asami Seto leads a cast that never lets the concept overwhelm the characters. Available now on Netflix — press play and find out why people keep recommending it.

Part of the current wave of titles people are actually watching, B: The Beginning earns its spot. The world-building is meticulous, but it is the characters who carry B: The Beginning through its more ambitious moments. Genius investigator Keith Flick rejoins the royal police force just as serial killer "B" emerges. Mysterious youth Koku may be an ally, or a target. Asami Seto and Hiroaki Hirata lead a cast that makes the ambitious moments land. It ran for 2 seasons (2018–2021), and the writing holds up across every one of them. What separates B: The Beginning from lesser genre entertainment is a willingness to let the concept cost the characters something. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

For late-night viewing or a proper weekend binge, B: The Beginning fits the bill. Fans of Bungo Stray Dogs will recognise the sensibility here immediately. The complete run is available and best experienced without too much prior knowledge of where it goes. Watch for Asami Seto in particular — the performance elevates the material. Satisfying on multiple levels.

B: The Beginning wrapped up in 2021 — and 2 seasons are available to watch from start to finish. Find exactly where it's streaming below, and TV Butler Pro's free voice app makes it effortless to track your progress as you go. Just say the name, and Butler finds it instantly, tells you which service has it, and remembers exactly where you left off.

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📺 Where to Watch B: The Beginning

Australia

United States

United Kingdom

Canada

New Zealand

🎭 Cast of B: The Beginning

Asami Seto
Asami Seto
Lily Hoshina (voice)
Hiroaki Hirata
Hiroaki Hirata
Keith Kazama Flick (voice)
Yuki Kaji
Yuki Kaji
Kokuu (voice)

🗂️ All Seasons of B: The Beginning

1
Season 1
12 Episodes · 2018
2
Season 2
6 Episodes · 2021

📋 If You Like B: The Beginning, Try These

Bungo Stray Dogs
2016
Kemono Jihen
2021
ID: INVADED
2020
Dimension W
2016
Paranoia Agent
2004
Hell Girl
2005

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