1. Bölüm

Elisabeth Sladen

Sarah Jane Smith

Tommy Knight

Luke Smith

Alexander Armstrong

Mr Smith (voice)

Yasmin Paige

Maria Jackson

Samantha Bond

Wormwood

Juliet Cowan

Chrissie Jackson

Jamie Davis

Davey

Konnie Huq

Blue Peter Presenter

Gethin Jones

Blue Peter Presenter

John Leeson

K9 (voice)

Sydney Rae White

Bubbleshock Girl

Joseph Millson

Alan Jackson

Rungano Nyoni

Secretary

Porsha Lawrence-Mavour

Kelsey