On 8 March 1993 "Doctor Who" returned to the ABC schedule, this time at 4:30am Monday-Friday. Again picking up from where the last block had left off, this run commenced with "Castrovalva" and continued virtually uninterrupted until almost exactly one year later. Over the course of that year, all Fifth Doctor serials except "The Five Doctors" were screened, followed by the first seven Sixth Doctor serials up to "Revelation of the Daleks". Another run of Tom Baker episodes started in July, from "The Ark in Space" and cycling through twenty serials – mostly in original UK transmission order – before reverting to "Revenge of the Cybermen" in November (it hadn't been screened in July).