Strax

Madame Vastra, Jenny Flint, and Strax (informally known as the Paternoster Gang, together with the Doctor), are a trio of recurring fictional characters in the British science fiction television series Doctor Who, created by Steven Moffat, and portrayed, respectively, by Neve McIntosh, Catrin Stewart and Dan Starkey. The three characters first appear in the sixth series episode "A Good Man Goes to War." Madame Vastra (a Silurian) and Jenny Flint (a human) are a married couple. Wikipedia

Madame Vastra, Jenny Flint, and Strax (informally known as the Paternoster Gang, together with the Doctor), are a trio of recurring fictional characters in the British science fiction television series Doctor Who, created by Steven Moffat, and portrayed, respectively, by Neve McIntosh, Catrin Stewart and Dan Starkey. The three characters first appear in the sixth series episode "A Good Man Goes to War." Madame Vastra (a Silurian) and Jenny Flint (a human) are a married couple. Wikipedia