Peter Chester, sometimes credited as simply Pete Chester, was the credited best boy on nearly all episodes of the first five series of the BBC Wales version of Doctor Who.
- 42
- The Age of Steel
- Aliens of London
- The Almost People
- Amy's Choice
- Army of Ghosts
- Bad Wolf
- The Beast Below
- The Big Bang
- Boom Town
- A Christmas Carol
- The Christmas Invasion
- Cold Blood
- The Crimson Horror
- The Curse of the Black Spot
- Dalek
- Daleks in Manhattan
- Day of the Moon
- The Doctor Dances
- The Doctor's Daughter
- The Doctor's Wife
- Doomsday
- The Eleventh Hour
- The Empty Child
- The End of Time
- The End of the World
- Evolution of the Daleks
- Father's Day
- Fear Her
- The Fires of Pompeii
- Flesh and Stone
- Forest of the Dead
- The Girl Who Waited
- The Girl in the Fireplace
- The God Complex
- A Good Man Goes to War
- Gridlock
- The Hungry Earth
- The Idiot's Lantern
- The Impossible Astronaut
- The Impossible Planet
- Journey's End
- Last of the Time Lords
- The Lazarus Experiment
- Let's Kill Hitler
- The Lodger
- The Long Game
- Midnight
- New Earth
- The Next Doctor
- Night Terrors
- The Pandorica Opens
- The Parting of the Ways
- Partners in Crime
- Planet of the Dead
- Planet of the Ood
- The Poison Sky
- The Rebel Flesh
- Rise of the Cybermen
- Rose
- The Runaway Bride
- The Satan Pit
- School Reunion
- The Shakespeare Code
- Silence in the Library
- Smith and Jones
- The Sontaran Stratagem
- The Sound of Drums
- The Stolen Earth
- The Time of Angels
- Tooth and Claw
- The Unicorn and the Wasp
- The Unquiet Dead
- Utopia
- The Vampires of Venice
- Victory of the Daleks
- Vincent and the Doctor
- Voyage of the Damned
- The Waters of Mars
- The Wedding of River Song
- World War Three