What episode does Allison comes back?

What episode does Allison comes back?

Alison returned to Rosewood in “Whirly Girlie”, which shocked the entire town as they still thought she was dead.

Does Allison come back in season 4?

Sex Education Star Patricia Allison Will Not Be Returning for Season 4.

Does Allison ever return?

In the series, Allison died at the end of Season 3, after Reed decided to leave the show. The teaser, however, reveals that the character is back from the grave under mysterious circumstances.