The ever-expanding franchise of A Certain Magical / Scientific Series brings to you an anime that narrates adventures of the fan-favorite, anti-hero Esper, Accelerator! A Certain Scientific Accelerator follows his journey towards ‘heroism’ where he must let go of his twisted, villainous ways and defend the Academy City.
1. Can you Watch Accelerator before the main series?
While A Certain Scientific Accelerator is essentially a spin-off of the original Magical Index series, in theory, you can watch it before the main anime. However, it is not recommended to do so. The characters appearing in the spin-off will not seem as interesting as they should if you decide to skip.

If you really don’t feel like watching the entire series, do watch the first season, i.e., A Certain Magical Index (2008), so that you get a little background on the characters.
Normally, A Certain Scientific Accelerator should be watched after completing all 3 seasons of A Certain Magical Index as well as A Certain Scientific Railgun.
2. Release Info
A Certain Scientific Accelerator started airing in 2019.
No. of seasons: 1
No. of episodes: 12
3. Conclusion
As stated above, A Certain Scientific Accelerator should be watched after completing all other installments in the series for the best viewing experience.
4. About A Certain Scientific Accelerator
A Certain Scientific Accelerator is a spin-off of the A Certain Magical Index series directed by Nobuharu Kamanaka. It is animated by J.C. Staff.

The plot follows the story of Accelerator, an extremely powerful Esper, who finds himself involved in a controversy surrounding an organization known as Disciplinary Action. The organization aims to misuse the Last Order for a dangerous mission and are on the pursuit of a young girl. Accelerator and his new partner, Rosenthal, must protect the Last Order and defend the Academy City.
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