Well, you've heard about two of them already. The Alzarian, Adric was his name, as well as Nyssa.

The third was named Tegan. Tegan Jovanka from Austrailia. Picked her up in the early 80s, or rather she picked herself up. Wandered straight into the TARDIS and got lost. She...[he smiles crookedly.]...reminds me of Donna to an extent, except Tegan was far more combative and vocal about her displeasures than Donna, but...she was just scared. Defence mechanisms, you know.