Christina Cox Christina appeared in three episodes of Stargate SG1 and Stargate Atlantis, she played Major Anne Teldy in SGA Whispers, Lt Kershaw in SG1 The Sentinel & T’akaya in SG1 Spirits. She has also starred in Blood Ties, F/X: The Series and Defying Gravity, The N&N Files: Nikki and Nora, Shadowhunters: The Mortal Instruments [...]