The Eyes of Silverweed - S3.E9

Silverweed traps Fiver in a twisted dreamworld illusion, allowing him to invade Fiver's mind and see through his eyes to learn the location of Watership Down for his master, Woundwort. Fiver manages to fight off Silverweed's hold, but not before Silverweed deduces that Watership Down is "in the high hills, near a lone beech tree." Hazel realizes how dangerous Silverweed is so he and the others journey to Darkhaven with the intent of kidnapping him. Meanwhile, Campion and Blackberry have the same idea, whilst Granite becomes Woundwort's new second-in-command when he challenges Vervain to single combat. Vervain forfeits rather than face the stronger Granite.