One of the 50th anniversary publications that I had missed, this is a great romp of a plot line across the timestreams of the first eleven Doctors, with due homage to the characterisations and in particular bringing back a slightly forgotten but entirely appropriate character to ask what the role of the Doctor's companions actually is. These multi-Doctor adventures (of which there are now quite a number in different media) are always a bit dangerous to do, but the format of giving each Doctor an adventure for their own voice to be heard before bringing them together at the end works very well. The Tiptons obviously get it.
Rather bravely IDW have used different artists for each episode (full list: Simon Fraser, Lee Sullivan, Mike Collins, Gary Erskine, Philip Bond, John Ridgway, Kev Hopgood, Roger Langridge, David Messina, Elena Casagrande, Matthew Dow Smith and Kelly Yates). Even more remarkably - I thought he had completely disappeared - several of the covers were drawn by Dave Sim, of Cerebus fame; and they are good pieces too, including the cover for the book as a whole. (I see Sim is reviving Cerebus for a short run; one shudders in anticipation.) I wan't completely convinced by Philip Bond's art for the Fifth Doctor (and especially Adric), and several of the others struggled with the companions. But I particularly liked the Sarah Jane Smith / Liz Shaw matchup by Mike Collins above, and Matthew Dow Smith is great drawing his near namesake. Generally very good fun.