Doctor Who special effects

The latest Doctor Who Magazine Special Edition is devoted to six decades of effects in the series. As well as the astounding revelation that the heat barrier in The Daemons (1971) was a physical effect made from tinsel, there's a couple of things by me.

To understand how last year's episode Heaven Sent was realised, I spoke to Will Cohen, Louise Hastings and Salvador Zalvidea at Milk VFX, Kate Walshe at Millennium FX and Samantha Price at BBC Wales.

(The feature also owes a lot to Warren Frey's amazing hour-long interview with director Rachel Talalay, for the Radio Free Skaro podcast. Following that, Talalay posted a video of her demo for the SFX team, demonstrating how they could make a dissolving hand for the episode using a bath bomb kit.)

I also spoke to Academy Award-winning Paul Franklin from Double Negative, who hasn't worked on Doctor Who but explained to me its influence on his own work - including what bits of the series were used as placeholder footage during the making of the movie Interstellar.

(I met Paul when he and I were panelists on The Infinite Monkey Cage last year.)