An exercise machine has the Dragons lacking motivation; a tidal energy bridge gets a dose of reality; and two entrepreneurs enter the Den to pitch their magnetic gift card idea to the Dragons.

The Dragons are presented with a business idea for self-help "Mystical Cards"; a pair of super binoculars claim to be able to see through almost anything; and one entrepreneur has an idea that is designed to help families stay clean and save money.

Two recent MBA graduates believe they have the next big business idea; a "Ski Limo" pitch promises to chauffeur non-skiers down the slopes; and an entrepreneur with natural first aid products is looking for a serious investment from the Dragons.

The show begins on a high note with an idea for amusement park rides; an entrepreneur tries to sell the Dragons on a special brand of bottled water; and a business that caters to small-sized uniforms has the Dragons wondering if less is more.

A hopeful entrepreneur enters the Den with cheeky underwear; a new shower idea has the Dragons thinking about safety first; and things heat up in the Den when an entrepreneur pitches a new spin on cook stoves.

The Dragons get a pitch for a hi-tech billboard; an entrepreneur tries to convince the Dragons there's big business in custom-made pet products; and the Dragons are presented with a creepy-crawly business idea for life-sized mobile haunted houses.

The Dragons catch up with some of the most unforgettable entrepreneurs from the first season.