From here:
Broadcasts
Thursday 3rd June 9.30pm BBC2
Saturday 5th June 7.25pm BBC2
Monday 7th June 0.20am BBC1
Thursday 10th June 2.00am BBC1
To mark the 70th anniversary of the ‘miracle of Dunkirk’, 50 of the surviving little ships which made the original perilous cross-channel voyage are returning to France. Dan Snow tells their extraordinary story: their role in the evacuation and the people who struggled to keep them afloat during those fateful days in 1940, when the future of Europe hung in the balance.