Most of the 1970s and 1980s editions of the series are lost (there are lost episodes from as recently as 1986). One that does survive from the early years celebrated the tenth anniversary of Doctor Who (1963) in 1973, featuring interviews with Patrick Troughton and visual effects designer Bernard Wilkie, which is included on the special features of The Three Doctors DVD. Some other Doctor Who (1963) related items from the series have survived due to early domestic video recordings and have been released on DVDs, including interviews with Tom Baker and Philip Hinchcliffe.