Imfihlakalo Yobudala Bomntwana ovela ku-Epiminal Science Ficting 4. Kodwa-ke, ekuhambeni kwenkathi yeshumi nambili, kwaziwa ukuthi empeleni udokotela mdala kakhulu kunalokho obekucatshangwa ukuthi kungacatshangwa - mhlawumbe iminyaka yakhe iqukethe izigidi zeminyaka. Ngasikhathi sinye, i-SNAG ukuthi lolu lwazi alwaziwa nodokotela uqobo, ukuze izingxabano mayelana nobudala beqhawe zisasebenza.
Ngokokuqala ngqa, udokotela ukhuluma ngeminyaka yakhe ochungechungeni lokuqala lwesizini okwesihlanu abizwa ngokuthi "i-cyberlllud Tomb". Kulesi siqephu, udokotela wesibili uveza ukuthi uneminyaka engama-450. Kamuva, udokotela wesithathu ubika ukuthi ubelokhu ephila iminyaka eyizinkulungwane eziningana. Ngemuva kwesikhathi ngokuhamba kwesikhathi, udokotela wesine wamukelwa engxoxweni noSarah Jane ukuthi uneminyaka engama-750. Ngaleso sikhathi, odokotela besithupha nowesikhombisa bathi baneminyaka engaba ngu-950. Ngasikhathi sinye, ochungechungeni lwanamuhla, udokotela wesishiyagalolunye waphawula ukuthi wayeneminyaka engama-900 ubudala.
Ukuchazwa okulula kwalezo zinto ezihlukile ukuthi udokotela umane afanela futhi asho uNabom. Emagazini okhethekile "Usuku lukaDokotela", udokotela weshumi nanye uthi yena nomunye umfanekiso wakhe "oneminyaka eyishumi nambili engaphezu kwezinkulungwane zeminyaka." Kepha bese uyanezela:
Yize ngingaqamba amanga. Mina uqobo angikhumbuli.
Ngasikhathi sinye, kuneminye inkolelo-mbono yeminyaka yangempela yodokotela kabani. Ngokusho kwengosi esikrinini, impendulo ingatholakala emazwini odokotela wesibili, oke athi uneminyaka engama-450 "ezindinganisweni zasemhlabeni." Kusukela kulokhu kucaciswa, kungaphethwa ngokuthi udokotela kwesinye isikhathi ubala iminyaka yawo eminyakeni yasemhlabeni. Asazi ukuthi unyaka uhlala isikhathi esingakanani kuma-galler, iplanethi yendabuko yeqhawe. Mhlawumbe, ngalezi zindinganiso zangaphandle, iminyaka yodokotela yakha ngempela iminyaka eyizinkulungwane ezimbalwa - okungukuthi, unyaka waseGallifraine mfushane kakhulu kunonyaka emhlabeni.