ALT: a black and white dog is sitting in front of a computer screen and says `` good lord '' .

ALT: a man in a suit and tie is smiling in front of a group of people in a bar .

ALT: a black and white dog is sitting at a desk in front of a computer monitor .

The Rubber Keyed Wonder tells the story of legendary British inventor Sir Clive Sinclair and the evolution of the landmark ZX Spectrum home computer. First released in 1982, the ZX Spectrum sold millions of units worldwide, opening the door to a new world of possibilities and a booming generation of consumer tech. Most notably, the ZX Spectrum enabled users to learn computer programming, helping to kickstart the video-game boom of the 1980s. Bonus Features: Chris Curry on Calculators and the MK-14 Games that Missed the mark Gargoyle Games The LOAD Museum Mark Howlett on creating Maps From Gremlin to Sumo The Development of the ZX80 and ZX81 Bonus Features Exclusive to Blu-Ray: From Jet Set Willy to Mega-Tree: The Game that Never Was! Steve Turner: Making Quazatron Sandy White: Making Ant Attack From Equinox to Stormlord: The ZX Games of Raff Cecco Julian Gollop The Early Days: Board Games to Video Games The Last Ninja 2: Making of with Mev Dinc The Great Escape - Making of with Denton Designs Steve Turner: Avalon to Dragontorc The Real Micro Men: The Fight for the BBC Contract Clive Townsend: Making Saboteur Batman to Head Over Heels: The Games of Jon Ritman Chuckie Egg: Making of with Nigel Alderton Finders Keepers to Stormbringer: Dave Jones on the Magic Knight US Gold & the ZX Spectrum Match Day 1 & 2: Jon Ritman on a Footballing Classic – Extended World Cup Carnival - the worst game ever made? Peter Harrap: Creating the Monty Mole Series Archer MacLean talks Sinclair computers.