Episode 62

Tsubaki's Unrelenting Evil Spell is 62nd episode of Inuyasha

Plot
Tsubaki's curse traps Kagome's mind in a morden era illuson. Kagome refuses the illusion at first, but slowly falls for it, thinking her life in the Fuedal Era was only a long dream. The curse shows what her life could be like with her friends, exams, and her possible future with Hojo. However the curse begins to weaken when Kagome passes an archery range on her way home from school. There she fails at hitting a mark, and the range director speaks with her. The director is revealed to be Kikyo interferes with the curse and breaks the illusion. Kikyo leaves warning Kagome not to follow her footsteps making the same mistakes she did killing InuYasha 50 years ago. She leaves Kagome with the question "Who are you?" to remind her, she is Kikyo's reincarnation, not Kikyo, and karmically she is meant to surpass Kikyo correcting the mistakes of her passed life with different choices.

Kagome wakes up and a battle insues, ending in Kagome defeating Tsubaki in the same manner that Kikyo defeated her 50 years ago, albiet in a much more desperate manner. The defiled Shikon Jewel Tsubaki was using for the curse purifies, but before the heros can grab it, the disgraced Tsubaki escapes.

Far off, Kagura questions letting Tsubaki live retaining the Jewel. Naraku response is he will give her a chance for revenge before going to retrieve the Jewel.

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Note that Kikyo appearing in the illsion/curse, is never directly confirmed to be the real Kikyo and may only be a construct of Kagome's mind, a part of her subconsious that is fighting Tsubaki's curse. This seems a more likely course as we do not see Kikyo outside of the illsion after this, and Kikyo's prior conversation with Tsubaki declared an alarming lack of concern for Kagome saying Tsubaki could do whatever she wants with Kagome so long as it doesn't kill InuYasha.