sentences:  This similarity caused the production team some concern, and producer Barry Letts eventually decided that he would rather start the series with a Dalek adventure instead of ending it with one.An unrelated submission by Louis Marks was therefore rewritten into "Day of the Daleks", and "The Time Monster" was then written and commissioned to replace the original series finale.Written by Bill Strutton, this four-part story was submitted to the production office on 25 September 1970 after Strutton had gained an interest in writing for the series again after scripting "The Web Planet" five years earlier.