After having aired more-or-less continuously for nine years, 1974 saw a dramatic ongoing change in the ABC's scheduling of "Doctor Who". The last twelve first-run episodes of Season 9 were broadcast weekly between January and March, followed by Monday–Friday repeats of the same season from September/October until December/January. For several years in the mid-1970s there followed a haphazard scheduling of "Doctor Who", with seasons either broken up or only partially screened due to serials being omitted, as well as last-minute or unannounced cancellations of scheduled broadcasts that were occasionally countered by equally abrupt and unannounced 'surprise' broadcasts if, for example, a sporting event was cancelled due to bad weather.