Episode Detail: Ariel - Firefly
The crew helps Simon infiltrate a ritzy planet's hospital for info on the experiments going on at River's school. But as he uncovers the cause of her psychosis, a betrayal by one of the Serenity members puts the Tam siblings back into the hands of the Alliance. McGinnis: Blake Robbins. Doctor: Tom Virtue. Simon: Sean Maher. River: Summer Glau.