Doctor Who: The Tenth Doctor: The Good Companion Part 4

The Time Sentinels have declared war upon the Doctor! After kidnapping Gabby and sending the Circle of Transcendence to destroy Aramuko, the Sentinels are intent on meddling in events to eradicate the Doctor from Time itself… But not all of the Sentinel collective approve of this plan. Aspect Blue (who had masqueraded as Noobis' girlfriend, Siffhoni) has formulated a plan of his own – and has seeminly helped Gabby escape in the Red TARDIS.