 However , he denied that his intention was to give a warning about technology , but rather tell an adventure story about a " new way [ for aliens ] to invade " based on something viewers were familiar with . Producer Marus Wilson suggested that the episode be an " urban thriller " , as the story would already be set in contemporary London to introduce Clara and the Wi @-@ Fi monsters . Moffat compared the style to James Bond and The Bourne Identity . Moffat said that the episode was " an action roller coaster " rather than a story intended to be scary . 
