Originally Posted by ::Adam:::
“They might of done already, but are keeping it a secert untill they have to say, for example we could be having an old companion back back like Michelle Ryan, heck even Catherine Tate could come back, i guess only time will tell.”
There's no way CT will be back as the full time series 5 companion
I do think it's likely that they have got their new companion already but we won't be told for a little while yet.