The Martha Jones robot was a duplicate of Martha Jones created by an enemy of the Tenth Doctor's who somehow managed to infiltrate the TARDIS via teleportation. The Doctor reprogrammed her to believe that she was the real Martha Jones, but she fled after he acted hostilely towards her. The truth of her nature was revealed to her by Donna Noble, and she was subsequently left on an alien planet by the Doctor and Donna. (COMIC: Mad Martha)
| Companions of the Tenth Doctor |
|---|
| | Original to television |
| Multi-story | | | | Single-adventure | | | | Multi-adventure | | | | Narratively ambiguous | |
| | | Original to prose |
| Multi-story | | | | Single-adventure | |
| | | Original to comics |
| Multi-story | | | | Single-adventure | | | | Multi-adventure | |
| | | Original to audio |
| Multi-story | | | | Single-adventure | |
| | | Original to video games | | | Multi-adventures reference the rare instance when a companion is shown or stated to have multiple adventures with the Doctor but only appears in a single story.
If a medium is not mentioned, then this incarnation did not have companions who were original to that medium; it does not mean that this Doctor failed to appear in that medium. |
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