Doctor Who has been referenced in many short videos and TV shows .
Doctor Who has also spawned numerous spin-offs , including comic books , films , novels , audio dramas , and the television series Torchwood ( 2006–2011 ) , The Sarah Jane Adventures ( 2007–2011 ) , K-9 ( 2009–2010 ) , and Class ( 2016 ) , and has been the subject of many parodies and references in popular culture .
Doctor Who