After my highly negative assessment of episode 3 (“the worst episode of Doctor Who ever“), episode 4, “Nikola Tesla’s Night of Terror,” was fine, if forgettable.

And then last Sunday, we got — wait…

SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS

Don’t read on if you haven’t yet seen episode 5, “Fugitive of the Judoon.”

OK. Last Sunday we got “Fugitive of the Judoon.” Which is without doubt the best episode of Chibnall’s time as showrunner, so far. And may well be the most important episode since the programme came back in 2005. Or at least, be the start of the farthest-reaching changes since Russell T Davies brought us the concept of the Time War.

Two genuinely surprising reveals! Jack’s back; and… so is The Doctor? Whaaaattt???!!?

Fandom is, of course, rife with speculation as to where Jo Martin’s Doctor falls in The Doctor’s timeline. Future? Past? Or an alternative universe? And what of this “Lone Cyberman”?

Halfway through this, season, and it’s shaping up to be something very special. I just hope they don’t let us down.