Watership Down - Season 3 - Eps 10: The Spy
Spartina is sent by Woundwort to befriend Hazel and the others and act as a spy for him. However Silverweed soon learns of her real objective. If Spartina does not return to Darkhaven by the next full moon, she has ordered Granite to kill Blackberry.
About Watership Down

Title: Watership Down
First Air Date: 1999-09-28
Last Air Date: 2001-12-04
Status: Ended
Rating: 7.231/10 (from 13 votes)
Language: EN
Seasons: 3
Total Episodes: 39
Network: YTV
Genres: Animation, Sci-Fi & Fantasy
Production Companies: Decode Entertainment, Nepenthe Productions, Alltime Entertainment Ltd.
Synopsis
Follows the lives of a group of rabbits as they leave their endangered warren in search of a safe new home. They travel across the English countryside, braving perilous danger, until they find a hill called Watership Down, where they begin a new warren. However, they face various threats and are soon forced to defend their home and lives.
Cast

Andrew Falvey
Fiver / Flax / Feldspar (voice)

David Holt
Vervain / Bluesky / Boxwood / Darkling (voice)

Stephen Mangan
Bigwig / Silverweed (voice)

Sue Elliott-Nichols
Blackberry / Tabitha (voice)

Lee Ross
Hawkbit (voice)

Rob Rackstraw
Campion / Captain Holly / Hickory (voice)

Nigel Pegram
General Woundwort (voice)

Maria Darling
Hannah (voice)

Penny Freeman
Primrose (voice)