Other works

(1998) Scriptwriter of "Blake's 7 (1978): The Syndeton Experiment" (Radio Play) broadcast on BBC Radio 4 on 19 December 1998.

(1998) Wrote the radio play "Blake's 7 (1978) - The Sevenfold Crown."

(1990s) Wrote two BBC Radio plays based upon Doctor Who (1963): "The Paradise of Death" (1993) and "The Ghosts of N-Space" (1996), both of which Letts also adapted into novels. Both the radio plays starred Jon Pertwee as the Doctor.

(1974) Wrote a novel based upon the Doctor Who (1963) serial "The Daemons".

(2003) Provided a commentary for the Doctor Who (1963) DVD "The Three Doctors".

(2002) Provided a commentary for the Doctor Who (1963) DVD "Carnival of Monsters".

(2004) Provided a commentary for the Doctor Who (1963) DVD "The Green Death".

(2006) Provided a commentary for the Doctor Who (1963) DVD "Inferno".

(2007) Provided a commentary for the Doctor Who (1963) DVD "Robot".

(2005) Provided a commentary for the Doctor Who (1963) DVD "The Claws of Axos".

(2007) Provided a commentary for the Doctor Who (1963) DVD "The Time Warrior".

(2007) Provided a commentary for the Doctor Who (1963) DVD "Doctor Who and the Silurians".

(2007) Provided a commentary for the Doctor Who (1963) DVD "The Sea Devils".

(2009) Provided a commentary for the Doctor Who (1963) DVD "Planet of the Daleks".

(2009) Provided a commentary for the Doctor Who (1963) DVD "Frontier in Space".

(2009) Provided a commentary for the Doctor Who (1963) DVD "The Monster of Peladon".

(2009) Provided a commentary for the Doctor Who (1963) DVD "The Curse of Peladon".

(2009) Provided a commentary for the 2010 release of the Doctor Who (1963) DVD "The Time Monster".

(2009) Provided a commentary for the Doctor Who (1963) DVD "Planet of the Spiders".

(2009) Provided a commentary for the Doctor Who (1963) DVD "Day of the Daleks".

(2009) Provided a commentary for the Doctor Who (1963) DVD "The Mind of Evil".