Blücher

Blücher was a dog owned by Sebastian Vaughan. Sebastian named him due to his love of history and took him to Cardiff when his father arranged for him to join Torchwood Three. Blücher would never go outside during bad weather.

After Sebastian's death, Toshiko Sato returned Sebastian's body to Rockfell Hall. She went with Blücher, who was later killed by Sebastian's corpse which had been infected by a cortex leech. Tosh used it to prove to Madeline Vaughan that Sebastian was gone, as he would never have killed his beloved dog. (AUDIO: The Vigil)

Behind the scenes

 * "Blücher" was the name of which sank in 1940 during the, the first battle fought in World War II. It was named after , a Prussian field marshal who fought against Napoléon Bonaparte in the Battle of Waterloo.