Suggestions by @sparrowlucero

Meryl Streep

as Woman with unruly hair and rotten teeth in Dragon World

+1-0Score: +1

David Tennant

as Darren's cellmate in Dragon World

+1-0Score: +1

Hans Zimmer

as Composer in Dragon World

+1-0Score: +1

Mandip Gill

as Sophie Barron in Dragon World

+1-0Score: +1

Sylvester McCoy

as The Doctor in Dragon World

+1-0Score: +1

Mark Gatiss

as Donald Silver in Dragon World

+1-0Score: +1