The trio returns home to have fun on the trails. Dan splits time between creating jumps and riding them. Then tragedy strkes when Dan takes a hard crash and sustains a serious neck and head injury.

With Rachel and Dan injured, Gee heads to the British National Championships alone. Then it's off to another big challenge in Switzerland at the UCI World Cup.

The fifth stop of the UCI World Cup takes Gee to Italy, where he feels the pressure to perform. A third place finish frustrates Gee but makes him more determined than ever to win the next race.

Recovered from her dislocated shoulder, Rachel joins Gee as they head to Whistler, Canada for the Crankworx event and a bit of fun. Gee tries to shake off some of the World Cup pressure he's been feeling.

Gee heads to Utah for Red Bull Rampage. Eager to experience true American culture, he and the crew visit a shooting range in Las Vegas along the way. Then, things get a bit out of control at a fireworks store.

Recovered from his neck injury, Dan joins Gee and Rachel for serious training in Queenstown, New Zealand. For fun, the siblings go bungee jumping with their new mechanic, Polish Pete, and ride scooters.

After seven months of training, the Athertons race together for the first time in a long while. Later, they give a tour of their new racing headquarters in Wales, and then Gee is off to South Africa for round one of the World Cup.

Danny MacAskill visits for a ride through Llanrhaeadr and Shrewsbury with Dan and Gee. Dan reflects on his injury and the lessons he's learned. Then the Athertons head to Fort William, Scotland for Dan's first World Cup since his return.

The siblings compete in Leogang, Switzerland at the next round of the World Cup, and Dan is still getting re-accustomed to the fast World Cup racing speeds. Then, the trio go for intense flights in the Flying Bull stunt plane.

The team travels to Italy for some free riding before the next World Cup. After a week of relaxation, they reflect on the season so far and their goals for the future.

The team competes in round five of the World Cup in Windham. Rachel has a great run, but Gee and Dan struggle. Then it's off to Whistler for Crankworx, and Gee and Dan judge a bikini competition.