Fourth Doctor audio stories

The Fourth Doctor has featured in several audio stories.

Audio companions of the Fourth Doctor

 * Mike Yates (Hornets' Nest, Demon Quest, Serpent Crest)
 * Fenella Wibbsey (Hornets' Nest, Demon Quest, Serpent Crest, BBC Audio Dramas)
 * Sarah Jane Smith (BBC Audio Dramas, Short Trips, The Lost Stories, Once and Future)
 * Harry Sullivan (Short Trips, The Lost Stories)
 * Leela (The Companion Chronicles, Short Trips, The Lost Stories, The Fourth Doctor Adventures, Bonus Releases,Special Releases, Philip Hinchcliffe Presents, The Legacy of Time, Dalek Universe, Classic Doctors, New Monsters)
 * K9 Mark I (The Companion Chronicles, The Fourth Doctor Adventures, Dalek Universe)
 * K9 Mark II (The Companion Chronicles, The Fourth Doctor Adventures, The Lost Stories)
 * Romana I (The Companion Chronicles, The Fourth Doctor Adventures, Short Trips)
 * Romana II (The Companion Chronicles, The Fourth Doctor Adventures, Short Trips, Destiny of the Doctor, The Legacy of Time, The Lost Stories)
 * Adric (The Companion Chronicles, Short Trips, The Fourth Doctor Adventures, The Audio Novels)
 * Ann Kelso (The Fourth Doctor Adventures)
 * Sharon Davies (The Comic Strip Adaptations)
 * Margaret Hopwood (The Fourth Doctor Adventures)

New Series Adventures
After the Twelfth Doctor was hit by energy from the time storm, he entered a degeneration cycle, going back from his eleventh incarnation to his first.