The Time Lords of Doctor Who have (historically) had a policy of non-intervention, even putting the Doctor on trial because ...

Over half a century ago today, Doctor Who pulled off the first of an epic crossover that's now become an honored tradition.

A brief flashback in this Nigeria-set episode dives deep into the Doctor's past. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Reverse the ...