The TARDIS arrives in prehistoric times and a dinosaur manages to get aboard the TARDIS when the Doctor has his back turned!  But the Doctor's solution is ingenious - and worrying.  He simply travels into the future and the dinosaur 'disappears' because it becomes extinct as them move forward in time.  It's disappearance is depicted as it shrinking!  Quite why this effect doesn't seem to impact on Ian and Barbara isn't explained but let's hope the Doctor doesn't travel too far into their own futures!

Decided to do all 16 stories of these I think there basically Ian 1st and Barbara stories the final 2 retell the webplanet with just those 3 but over all there not the best but I think if I was from the 1960s I’d love them

dr. who uses bullshit time travel logic to kill a random stegosaurus