In August 2015, Grylls left his young son, Jesse, on Saint Tudwal's Island along the North Wales coast, as the tide approached, leaving him to be rescued by the Royal National Lifeboat Institution (RNLI) as part of their weekly practice missions. Jesse was unharmed, though the RNLI later criticised him for the stunt, saying its crew "had not appreciated" that a child would be involved.
Grylls also wrote the Mission Survival series of children's adventure survival books titled: Mission Survival: Gold of the Gods, Mission Survival: Way of the Wolf, Mission Survival: Sands of the Scorpion, Mission Survival: Tracks of the Tiger and Mission Survival: Claws of the Crocodile. He has written two thriller novels based around his character Will Jaeger; Ghost Flight released in 2015 and Burning Angels in 2016.
In 2015, he began presenting the six-part ITV series Bear Grylls: Mission Survive which features eight celebrities on a twelve-day survival mission. The series began airing on 20 February 2015. Mission Survive returned for a second series in 2016.
In summer 2015, China's Dragon TV ordered a Grylls-fronted adventure series titled Survivor Games (Chinese: 跟着贝尔去冒险). The series featured Grylls and eight Chinese celebrities and premiered on Dragon TV on 16 October 2015.
On 9 April 2015, The Scout Association announced that Grylls would continue as Chief Scout until 2018. Grylls wrote, "I am so proud that the largest youth movement on the planet has asked me to continue in my role as UK Chief Scout."
On 5 June 2015, Grylls, in an interview with The Telegraph, praised the challenge of being Britain's youngest Chief Scout, saying "Scouting humbles me every day".