Jonathan Smith

Jonathan Smith (quite possibly an alias) was the name used by a member of the Supreme Alliance of Eastern States from the 51st century while in London in 1889.

Smith, an expert on zygma beam radiation, had, in his native time on the planet Biblios, acquired a diary entry by H. G. Wells describing the death of the Tenth Doctor at the hands of Smith himself. He also knew how to restore the disfigured and dying Magnus Greel to health.

Smith planned to rescue Greel before an earlier incarnation of the Doctor could defeat him. Travelling back in time using zygma beam radiation to the 1880s, he posed as a graduate of Cambridge University and presented himself as a physicist of his adopted era. He strategically befriended Wells. The Doctor had forged the diary entry so that Smith would find it in the 51st century, setting up Smith's capture by the Torchwood Institute. Torchwood, as the Doctor had planned, mistook Smith for the Doctor himself, using his usual alias John Smith.

The Doctor believed that Smith would be released and face trial in his native time once Jack Harkness joined Torchwood and made them realise he wasn't the Doctor. (COMIC: The Time Machination) However, Smith was dissected before this could occur. (COMIC: Final Sacrifice)