Statistics for Doctor Who Villains That Were Introduced by Russell T Davies

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Debut Episode	Number of Episodes appeared in	Answer	% Correct
Aliens of London	3	The Slitheen	97%
The End of the World	2	Cassandra	87%
The Christmas Invasion	1	The Sycorax	84%
Smith and Jones	2	The Judoon	82%
Partners in Crime	1	The Adipose	80%
Utopia	7	The Master (John Simm's incarnation)	80%
The Runaway Bride	1	The Racnoss	67%
The Long Game	1	The Jagrafess	66%
Love & Monsters	1	Abzorbaloff	65%
Utopia	1	The Futurekind	58%
The Waters of Mars	1	The Flood	57%
The Sound of Drums	2	The Toclafane	53%
Voyage of the Damned	1	The Heavenly Host	44%
Army of Ghosts	4	The Cult of Skaro	42%
The Next Doctor	1	Cybershades	21%
New Earth	2	The Sisters of Plenitude	17%
Midnight	1	Midnight Enity	4%