- Christophe Beck
- Malcolm Clarke
- Dido - Here with Me (Music Theme)
- An Outbreak is the sudden or violent start of something unwelcome, such as disease, etc. This refers to the Zombies outbreak inside the town.
- When Enigma of the Dead was originally planned to be uploaded before The Angels Who Cried Wolf, this episode was named "Trio". It was than renamed to "Apocaylpse" then finally too "Outbreak".
- Roger Delgado does the voice of the Master, he originally played the Master during the Pertwee years in the 1970s.
- The interior of the TARDIS is seen for the first time since "Catacomb". It has been absent for five episodes.
- This episode was filmed before The Angels Who Cried Wolf, making it the first episode to be filmed outer uploaded order.
- The voice of the Master was achieved by using an Audio Clip from The Time Monster.
- The TARDIS has changed design quiet radically since it was last seen in "Catacomb". There is no explanation for this change.
- This is the first appearance of the Master in the Sims 3 series.
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