Could have been an excellent telling of Operation Grouse/Freshman/Gunnerside ... but ... Anna Friel's fictional Captain Smith is a constant irritant. What were the production staff thinking?
Why would a Colonel defer to a Captain? What is the silly hat perched on the side of her head and her uniform and medals- oh dear? Why add a Captain Carter (Marvel) remould to a real story?
The shouty American bombing planner is of no value to the story and constant "we have to stop the nazi atom bomb" is just silly . Nobody outside a very controlled small group new the true use of the Manhattan project etc , even Harry Truman (the man approved the use of the US bomb) was not briefed untill after Roosevelt died.
A story of extreme daring and courage ruined by the desire to bring in misplaced 21st century equality standards and vast innacuracy.