Did you spot the sneaky scientific Jon Pertwee reference in Doctor Who: It Takes You Away?

Jodie Whittaker used an old trick of the Third Doctor

Jon Pertwee as the Third Doctor (BBC, HF)

Doctor Who Easter Eggs and callbacks have been a little thin on the ground in the latest series of the sci-fi drama, but when they have turned up they’ve been fun little nods to earlier incarnations of Jodie Whittaker’s Doctor.

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And now series 11’s penultimate episode It Takes You Away has slipped in a subtle little reference to one of the most popular Doctors of all time – Jon Pertwee’s Third Doctor – when the current Time Lord was struggling to close a portal to another dimension.

“What if you do something it hasn’t dealt with before – like you reverse the polarity or something?” offers Mandip Gill’s Yaz, little knowing how appropriate that information is.

“Yasmin Khan – you speak my language,” the Doctor replies – and she’s not wrong. During his time on the series, Jon Pertwee’s Doctor often suggested that he or others “reverse the polarity” of some piece of technology, partly because Pertwee had asked the writers to give him easier technobabble to spout during the episodes.

In time “reverse the polarity of the neutron flow” became something of a catchphrase for the series, entering the popular culture perception of Doctor Who, though Pertwee only actually said that particular version of the line once.

Since Pertwee, a few other Doctors have used the phrase (including Tom Baker’s Fourth Doctor, Peter Davison’s Fifth, David Tennant’s Tenth and Matt Smith’s Eleventh), so really the Thirteenth Doctor should have remembered exactly the solution she needed.

And when we combine this callback with all the Venusian aikido we’ve seen Whittaker’s Doctor use this year, it’s looking like a pretty nostalgic time for fans of the Third Doctor still watching Doctor Who.

All we need now is a return for Bessie the Whomobile…

Doctor Who continues on BBC1 on Sundays

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This article was originally published on 2 December 2018