Julia boards HMS Prince of Wales to get a glimpse of life on the Royal Navy's newest aircraft carrier and former Royal Marine JJ returns to the Marine Commando Training Centre.
JJ Chalmers joins marine recruits as they come under heavy fire on a tactical training exercise in the Devon woods. Julia Bradbury gets to steer the HMS Prince of Wales and Rob Bell is on one of the UK's nuclear subs, HMS Trenchant.
JJ is put to the ultimate Marine training test, and also remotely drives an attack boat. Julia visits HMS Belfast and talks to veterans about what naval life was like during WWII.
