Separated at birth

Herbert Smith partner David Paterson/Tennant has broken new ground. He has seen documents no corporate lawyer has ever seen before. He has travelled through time and relative dimensions in space, in a wholly legal sense. He has a trusty assistant who does all the work. He smiles manically (possibly) and is occasionally seen with a sonic screwdriver and a robot dog (that last bit might not be entirely accurate). And he just did the first real estate investment trust in the UK for Hammerson (although almost exactly the same format has been used in France). He is… The Doctorer.