With the release of the Fifth Doctor's Sourcebook for the Doctor Who: Adventures in Time and Space RPG, we have the opportunity to run our own version of the classic episode The Five Doctors, for gaming groups that have really wanted to all play not just Time Lords, but The Doctor!
Again, like the other sourcebooks in the series, this one provides the predictable crunch (new traits, character sheets for the Doctor / Companions / acquaintances / enemies) and fluff (series and episode synposes), and provides some thematic explorations and comparisons to the episodes and themes from prior incarnations.
Of note are the plot motifs that keep repeating in this season: betrayals, surrogate parenthood, (relatively) large adventuring groups in the TARDIS, and so on.
By this fifth book, it's great to compare the growth of the Doctor and the selection of Companions throughout his career. I also noticed how often the Master figured into this season's adventures.
For a hard-core canon fan, there are many adventure seeds suggested that deal with inconsistencies or contradictions found in the season as compared to prior episodes or seasons. That alone may be enough to start an entire campaign. Clara's Commandos, anyone? She can't save the Doctor all alone, you know...