Which dragon joined the British programme Dragon's Den for its thirteenth series in 2015?

Touker Suleyman joined the British programme Dragon's Den for its thirteenth series in 2015.

Suleyman is a British-Turkish entrepreneur and investor whose business interests have included fashion, manufacturing and retail. He became known to television audiences after joining the Dragon's Den panel, where he evaluated pitches and negotiated equity deals with entrepreneurs.

His arrival occurred during a period when the programme was refreshing its investor line-up. He followed earlier dragons including Theo Paphitis, who had been associated with retail and business investment on the show. Suleyman's own background in manufacturing and fashion gave the panel another perspective on product development, sourcing and retail distribution.

The series number is useful because several dragons joined during different eras. Tej Lalvani joined later, while Steven Bartlett arrived in the twentieth series. Nick Jenkins was also a later investor, but he is not the dragon associated with the thirteenth series in 2015.