"This extraordinary character who is everything at all times. It's continuously inspiring really, to get to play this mercurial, anarchic, extraordinary creature who gets all the best lines and gets to be the cleverest person in the room. I'm sure I'll miss lots about it, but I'll forever be proud to have been part of it, to be part of that history."

"The Fourth Doctor: Shut up, K-9!"

"Quite right!"

"You took your time, K-9! (after thanking someone else for coming)"

"Take me to your leader."

"Are you listening to me?"

"You're standing on my scarf."

"Hello-o-o-o"

"Would you like a jelly baby? (Sometimes slightly changed to "Have a jelly baby." and other variations)"

"Prisoner Zero"

"Krillitanes"

"Great Intelligence"

"The Master"

"The Black Guardian"

"The Beast of Doom"

"The Atraxi"

"The Weeping Angels"

"The Cybermen"

"The Daleks"

"Belinda Chandra (2025)"

"Ruby Sunday (2023-2024)"

"Dan Lewis (2022)"

"Graham O'Brien (2018-2021, 2022)"

"Ryan Sinclair (2018-2021)"

"Yasmin Khan (2018-2022)"

"Bill Potts (2017-2017)"

"Clara Oswald (2012-2015)"

"River Song (2008, 2010, 2011, 2012, 2013)"

"Rory Williams (2010-12)"

"Amy Pond (2010-12, 2013)"

"Wilfred Mott (2007-08, 2009-2010)"

"Martha Jones (2007, 2008, 2010)"

"Donna Noble (2006, 2008, 2010, 2023)"

"Mickey Smith (2005-06, 2008, 2010)"

"Jack Harkness (2005, 2007, 2008, 2010)"

"Rose Tyler (2005-2006, 2008, 2010)"

"Grace Holloway (1996)"

"Ace (1987-89)"

"Melanie Bush (1986-87 2023-25)"

"Peri Brown (1984-86)"

"Kamelion (1983, 1984)"

"Vislor Turlough (1983-84)"

"Nyssa (1981-83)"

"Tegan Jovanka (1981-84)"

"Adric (1980-82)"

"Romana (1978-81, 1983)"

"K-9 (1977-81, 1983, 2006, 2008)"

"Leela (1977-78)"

"Harry Sullivan (1974-75)"

"Sarah Jane Smith (1973-76, 1983, 2006, 2008, 2010)"