Slowpoking reply but Class definitely hasn't set the world afire, it's digital airing is struggling, we'll see if that changes for its terrestrial broadcast. Also was your Torchwood thing a typo? No Doctor (other than Peter Capaldi not as the Doctor) has ever been in Torchwood. RTD didn't want to put the Doctor in something he felt children shouldn't watch. Tennant and Smith each got 1 appearance in SJA but that's as far as the Doctor in RTD era spin-offs went.