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01. Series 1
02. Series 2
03. Series 3
04. Series 4
05. Series 5
06. Series 6
07. Series 7 - Intervention Earth
08. Series 8 - Enemy Lines
09. Series 9 - Time War 1
10. Series 10 - Time War 2
11. Series 11 - Time War 3
12. Series 12 - Time War 4