In 1999 Big Finish began producing audio dramas featuring the Fifth, Sixth, and Seventh Doctors, and have since developed the pattern of thirteen releases per year, one every month, with two in September. From 2001 to 2007 the monthly range also included releases featuring the Eighth Doctor with his companions Charley Pollard and, later, C'rizz, but these were ended due to the simultaneously-running New Eighth Doctor Adventures which ran from 2006 to 2011 and featured companion Lucie Miller. From 2008 to late 2011, only one Eighth Doctor release was produced for the monthly range: The Company of Friends (featuring companions from other media to the audio plays, and the historical figure Mary Shelley). The Eighth Doctor returned to the monthly range in a trilogy of adventures with Mary Shelley in October 2011. As of April 2016[update], the monthly audio series features the Fifth, Sixth and Seventh Doctors, in four seasons of three audio plays, each featuring the same Doctor and, to a reasonable degree, companion/s, being released consecutively, along with one special anthology release per year. In other words, four three-release trilogies and one other standalone anthology audio are released every year.