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The Classroom of a Black Cat and a Witch S1E4 — Castor Gemini's Fate
8.4
The Classroom of a Black Cat and a Witch•Season 1•Episode 4

Castor Gemini's Fate

8.4/10 · 41 votesMay 3, 202624 min

Ranked #9 of 24 in Season 1•matches the season avg

Discussion

The class is tasked with collecting mandrakes, when Io and Spica end up in a bit of a bugbear.

Previous episodeE3 · The Magicians of the ZodiacNext episodeE5 · Spica and Aria
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Seasons1

All1

Season 1 Episodes24

Black Cat & Spica stillE1 7.8

Black Cat & Spica

Magic of the Zodiac stillE2 8.5

Magic of the Zodiac

The Magicians of the Zodiac stillE3 8.3

The Magicians of the Zodiac

Castor Gemini's Fate stillE4 8.4Now viewing

Castor Gemini's Fate

Spica and Aria stillE5 8.5

Spica and Aria

Midterms stillE6 8.4

Midterms

Cross Magic stillE7 8.4

Cross Magic

Winter Camp Begins!! stillE8 8.5

Winter Camp Begins!!

Bond of Flames stillE9 8.4

Bond of Flames

The Attack stillE10 8.7

The Attack

Tarf's Purpose, Chiron's Resolve stillE11 9.0

Tarf's Purpose, Chiron's Resolve

The Superior Magician stillE12 8.9

The Superior Magician

Memories of Arcturus stillE13 8.3

Memories of Arcturus

Maids at the House of Regulus stillE14 8.2

Maids at the House of Regulus

Astraea's Troubles / Herbarium Book stillE15 8.4

Astraea's Troubles / Herbarium Book

Io Taurus Gets to Work stillE16 8.0

Io Taurus Gets to Work

Finals stillE17 8.0

Finals

Adventures on a Deserted Island stillE18 8.2

Adventures on a Deserted Island

Race for the Ruby stillE19 8.3

Race for the Ruby

Finding the Diamond stillE20 8.2

Finding the Diamond

Spica vs. Aria stillE21 8.2

Spica vs. Aria

Aria's Dream stillE22 8.5

Aria's Dream

Promising Upon a Starry Night stillE23 8.5

Promising Upon a Starry Night

The Forbidden Date stillE24 8.3

The Forbidden Date

Cast4

Kaede Hondo

Kaede Hondo

Spica Virgo (voice)

Nobunaga Shimazaki

Nobunaga Shimazaki

Claude Sirius (voice)

Fuka Izumi

Fuka Izumi

Aria Aquarius (voice)

Miho Wataya

Miho Wataya

Hana Sasorijo (voice)

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Episode Summary

"Castor Gemini's Fate" is episode 4 of The Classroom of a Black Cat and a Witch season 1. It scored 8.4/10 from 41 votes, ranking #9 of 24 episodes this season (season average 8.4). It aired on May 3, 2026.

Next: E5 · Spica and AriaBest of Season 1