 " Nana 's Party " was the first episode of Inside No. 9 to be written by the programme 's creators Reece Shearsmith and Steve Pemberton . BBC producers felt the episode worked as the opening episode of a sitcom , but Pemberton and Shearsmith were not happy to develop the idea into its own series , given the events of the plot . As such , the script was shelved , and revisited during planning for Inside No. 9 's second series . A number of changes were made from the original script when the concept was revisited . For example , a paramedic was added to the opening scene in order to add a sense of danger and foreboding , and the character Angela 's " borderline OCD " was accentuated . 
