system
Given the following post, respond as if you're commenting on Reddit:
human
[Rational Fanfic] What would the biggest changes to your favourite franchise be if the main character was given the rational treatment?
gpt
Doctor Who would be surprisingly similar, but very low-stakes, because the main changes would be that The Doctor would travel safely and understand the sorts of problems he commonly runs into. 

So he'd check when he was about to walk outside into a death zone. He'd carry walkie talkies for him and everyone he meets. He'd affix wrist-mounted teleportation devices to him and his companions that would always teleport them right back into the TARDIS, and likewise have an app on his Sonic screwdriver that tells the TARDIS to teleport to *him*. 

Speaking of which, he'd carry *two* sonic screwdrivers at all times, as well as tons of other gadgets that he's shown he has free access to, such as his invisibility​ watch, a bio-damper, a small reprogrammed robot, any sort of shielding such as a forcefield, etc. He canonically has dimensionally transcendental pockets, so he could have as much stuff as he needs. There's no excuse for him to ever be unprepared.

Your average story would consist of landing right next to the people in need of help, instead of bumping into them fifteen minutes in, rushing them all into the TARDIS, taking them home, and then coming back and carefully dispatching the threat, with teleportation "checkpoints" to bounce between whenever​ things get dangerous.