Steve Caplin wows Simon Rose with the latest in the world of gadgets. Dr. Who at Christmas reduces the death rate. There's an electric penny farthing, a cargo e-bike with 3 wheels in a line and an e-bike with no battery. Lego modellers can make a 1977 Polaroid camera. Apple is to update security to reduce iPhone theft. 3D portraits go portable. The missing space tomato has been found. Cardboard can be recycled into a polystyrene alternative. And Hyundai's tyres can come with built-in snow chains, though only in video form so far.

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