Theobald was a companion of the Ninth Doctor, who travelled alongside Alexander Pope. The pair were threatened with restriction from the TARDIS food machine's supply of viennetta. (PROSE: Double Falsehood)
| Companions of the Ninth Doctor |
|---|
| | Original to television |
| Multi-adventure | | | | Single-adventure | |
| | | Original to prose | | | | Original to comics | | | | Original to audio |
| Multi-adventure | | | | Single-adventure | |
| | | 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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