 It is possible, however, as Lawrence Miles and Tat Wood theorise in their reference book "About Time 5", that the energy discharge is simply a side effect of the Effect's operation.It also appears, given the number of times that the Doctor has met his other incarnations, that the Effect does not apply to Time Lords or, at the very least, can be mitigated.The Doctor appears to show sensitivity and resistance to temporal distortions, notably in "The Time Monster" (1973), "Invasion of the Dinosaurs" and "City of Death" (1979) (where Romana does as well).