Big Finish

Cast List: O

• Maureen O'Brien (cast in 37 episodes, e.g. Vicki in The Secret History)
• Mikey O'Connor (cast in 2 episodes, e.g. Thomas Eckert in Assassin in the Limelight)
• Emerald O'Hanrahan (cast in 2 episodes, e.g. Clementine Scrivener in Philip Hinchcliffe Presents: The Ghosts of Gralstead)
• Charlotte O'Leary (cast in 4 episodes, e.g. Poppy in Aliens Among Us - Part 2: Love Rat)
• Kevin O'Leary (cast as William Burke in Medicinal Purposes)
• David O'Mahony (cast as Aleksander in Torchwood Soho: Ascension)
• Daniel O'Meara (cast in 4 episodes, e.g. Ketch in Terror of the Sontarans)
• Siri O'Neal (cast in 6 episodes, e.g. Colonel Emily Chaudhry in The Coup)
• Maggie O'Neill (cast in 2 episodes, e.g. Lysandra Aristedes in Black and White)
• Gerry O'Toole (cast in 2 episodes, e.g. Lowell in Blood of the Daleks)
• Maureen Oakeley (cast as Dr. Dale Pargeter in Minuet in Hell)
• Maureen Oakley (cast as Pilot Susan Roberts in Red Dawn)
• Jolade Obasola (cast as Jasmine Jenning in End Game)
• Tracy-Ann Oberman (cast in 38 episodes, e.g. Temperance Finch in Deimos)
• Bill Oddie (cast as Red Jasper in Doctor Who and the Pirates)
• Amaka Okafor (cast in 4 episodes, e.g. Agnes / Legend-F in Ravenous 3: Deeptime Frontier)
• Nneka Okoye (cast in 3 episodes, e.g. Athelia in Most Wanted: Fast Times)
• Dolly Oladini (cast in 4 episodes, e.g. Mother/Till Girl in Iris Wildthyme Series 3: The Iris Wildthyme Appreciation Society)
• Eddie de Oliveira (cast as Willis in Davros)
• Ingrid Oliver (cast in 45 episodes, e.g. Helen/Oracle in Project: Destiny)
• Mark Oliver (cast in 2 episodes, e.g. Kolspen of Unvoss in Gallifrey VI: Renaissance)
• Sean Oliver (cast as Chief Blue in Red)
• Travis Oliver (cast in 6 episodes, e.g. Chris Cwej in Damaged Goods)
• Philip Olivier (cast in 30 episodes, e.g. Hex in Signs and Wonders)
• Maggie Ollerenshaw (cast in 7 episodes, e.g. Audrey McShane in Love and War)
• Katarina Olsso (cast in 2 episodes, e.g. Headhunter in Blood of the Daleks)
• Katarina Olsson (cast in 29 episodes, e.g. Shan/Computer/Earpiece Voice in Davros)
• Wanda Opalinska (cast in 5 episodes, e.g. Nadia Vasney in The Night Witches)
• Vivian Oparah (cast in 6 episodes, e.g. Tanya Adeola in Class - Volume One: Gifted)
• Stuart Organ (cast as Helgert Teveler in The Seeds of War)
• Sunny Ormonde (cast in 4 episodes, e.g. Molly in Circular Time: Summer)
• Tamzin Outhwaite (cast in 2 episodes, e.g. Morton in Forty 1: God of War)
• Sarah Ovens (cast as Kate in The Conspiracy)
• Sarah Ovens  (cast as The Cell in The Highest Science)
• Chris Overton (cast as Terrill/Levek in The Brood of Erys)
• Indra Ové (cast in 3 episodes, e.g. Tayna Vandermoy in The Robots Volume Two: Robots of War)
• Glyn Owen (cast as Commander Harlon in Nekromanteia)
• Jonathan Owen (cast in 3 episodes, e.g. Antranak in The Eye of the Scorpion)
• Kai Owen (cast in 25 episodes, e.g. Rhys Williams in Forgotten Lives)
• Merryn Owen (cast as Revnon in Time Works)
• Sion Tudor Owen (cast as Mr Collins in Poppet)
• Jude Owusu (cast in 4 episodes, e.g. Dransino in The Time War - Series 3: State of Bliss)
• Mateo Oxley (cast as Emperor Merdiven in Empire of Shadows)
• Emerald O’Hanrahan (cast as Mira in The Children of Seth)
• Charlotte O’Leary (cast in 5 episodes, e.g. Waitress in Corpse Day)
• Maggie O’Neill (cast in 2 episodes, e.g. Captain Lysandra Aristedes in Project: Destiny)