With only one more flight to go, he accepts that the decision to ground him was for his own good, and he visits Brown's aircraft as Brown and his crew prepare to take off on a mission. As the crew board the Lancaster the large 4,000 lb "cookie" bomb that is part of the bomber's load, slips from the bomb shackles and injures one of the crew. With no time to obtain a replacement crew member, US observer Mac Baker (William Sylvester) takes his place. Mason decides to go as well, to reassure the crew's worries about the jinx, and the bomber takes off.