 The interruption introduced by the writers meant that the explanation did not have to be expanded upon.The Effect is next mentioned in "Invasion of the Dinosaurs" (1974), where the Third Doctor states that it "tends to limit research into time travel" but, once again, he does not go into detail as to why.The novelisation of the story reveals that Blinovitch was a "great bear of a man from Russia" who had reversed his own timestream, reverting to infancy.