The middle three paragraphs are completely wrong. Clara isn't the Doctor's companion in this episode, that's not why the Doctor is confused, the Doctor is givin

The middle three paragraphs are completely wrong. Clara isn't the Doctor's companion in this episode, that's not why the Doctor is confused, the Doctor is giving a year (not a time), Clara doesn't know about “the time difference” (indeed, that is the joke)… That aside: I was suggesting this as an example of something existing machine translation systems can't translate. The 1207 / 12:07 wordplay could be “understood” by the model (I'm disappointed, albeit not very surprised, that GPT-4 didn't), but producing an adequate translation in a case like this requires actual thought and consideration.