Enigma of the Dead: "Duel" (Part Four) is a Doctor Who: Sims 3 episode, that will be uploaded sometime in 2013.
- Christophe Beck
- Dido - Here with Me (Music Theme)
- A duel is a contest with deadly weapons arranged between two people in order to settle a point of honour. This refers to the Doctor's and the Master's "Duel" during the climax of the episode.
- Katarina Jones does not appear in this episode. This is the second episode in a row that she has not appeared
- This episode is the second one in a row to have no guest stars at all.
- The Doctor's TARDIS is not seen at all. This is the first episode since "Annihilation" not to feature the TARDIS at all. It also makes the first time the Mark III TARDIS has not been seen since it's introduction in "Outbreak"
- One scene was deleted from this episode for timing reasons. Had the scene not been deleted, it would have made the first time one sees the Sonic Screwdriver since "Sabotage".
- The bird-eye view of Charles and the Doctor running outer the store, is reused footage from "Siege".
- Charles coughing wasn't originally supposed to happen. The Sim coincidently just happened to do it.
- Different music is heard during the recap, yet the music originally used, is heard right after the recap.
- Like most serials before, this one ends on a semi-cliffhanger.
- The effects the lab explosion have on the Doctor is not revealed until "Cure".
- The Doctor makes a potion to cure Charles's Zombification state, He would make another one for Katarina in "Cure".
- The voice of The Master was achieved by using Audio Clips from episodes such as The Time Monster.
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