The first British Dragon's Den series released in 2005 was titled Series 1.
The British programme premiered in January 2005 and its initial run was designated Series 1. That series established the format for British viewers: entrepreneurs entered the den, stated their business valuation and investment request, and faced questions from the original dragon panel.
The first panel consisted of Peter Jones, Duncan Bannatyne, Rachel Elnaugh, Doug Richard and Simon Woodroffe. Later series changed the lineup, but the basic structure remained familiar. The programme's use of numbered series rather than American-style season naming is reflected in British broadcast listings and reference works.
“Season 1” is understandable in international television language but is not the programme's usual British designation. “The Original Series” is also descriptive rather than an official title. Series 1 is the concise canonical label for the 2005 opening run.