Dalek

A Dalek made a cameo appearance in Doc Brown vs Doctor Who when Doc Brown commanded it via remote control, it was voiced by Dante Cimadamore.

Information on the Cameo
The Daleks are a hostile alien race in the famous science-fiction TV show Doctor Who. They were originally Kaled mutants from the planet Skaro, who, after a debilitating nuclear war, were encased in armour and named "Daleks" by the evil scientist Davros.

They are the Doctor's greatest enemies. The Doctor and the Daleks share a mutual fear towards one another, and they refer to him as 'The Oncoming Storm' on a number of occasions. Within their arsenal of weapons are a devastating ray gun capable of instantly killing anybody it shoots, along with a suction device which can suffocate victims and drain their life force. Also as a last resort technique, a Dalek may violently self-destruct. Despite their weight, Daleks are capable of flight. While a single Dalek can potentially pose little threat, they can wreak chaos extremely quickly and with no mercy when in great numbers and/or their space armada.

Appearance in the Rap Battle
During Doc Brown's first verse, a Dalek yelled its catchphrase "EXTERMINATE!!!" on Doc Brown's command, and shot a laser at the 10th Doctor, thus killing him.

Trivia

 * He is the third cameo with a minor line, the first two being KassemG and the Stormtrooper.
 * He is the second completely non–humanoid character to make any appearance, after HAL 9000.