Episode 1 series 2 The New Zygon World (TBC)

Cast:
The Doctor
Georgia
Zac
Proffessor Makensi
Student Ron
Student Fajartop
The President
Commander Zagrafix
Zygon Priest
Zygon Captain
Zygons!!!

The Doctor and Georgia, along with Zac arrive on one of the safest planets on Earth, to get a memorial plac for Conner. However, as they exit the TARDIS a spaceship appears above and shoots down at the large clay-coloured city. The Doctor and Georgia soon meet Proffessor Makensi and his two students, one of which is recognised by the Doctor. The ship belongs to the Zygons lead by their Commander Zagrafix.

Spoilers! Two of which are red herrings!
Kaylie makes a cameo appearance
A Zygon is disguised as a goody
The Doctor is attacked by Georgia, who thinks he's a Zygon
The Zygons have a new look
Zac becomes the new TARDIS companion after dumping Kaylie in the xmas special!
The Zygons stings fail to work...