Which Dragon's Den entrepreneur co-founded BrewDog with James Watt?

Martin Dickie co-founded BrewDog with James Watt.

Dickie and Watt established the Scottish craft brewery BrewDog in 2007. The company became associated with strongly flavoured beers, bold marketing and an aggressive challenge to established brewing brands. Its growth made the founders prominent figures in the British craft-beer movement.

BrewDog appeared on Dragon's Den in 2008, seeking investment while it was still developing its business. The founders did not secure an investment from the Dragons, but the television appearance became a notable part of the company's early story and is often discussed alongside its later expansion.

The question asks for Dickie because James Watt is his co-founder, not because the pair should be treated as one answer. BrewDog's founders are sometimes mixed up with other British food-and-drink entrepreneurs, but Dickie is the specific co-founder named here.