Set in 1943, Appointment in London stars Dirk Bogarde as Wing Commander Tim Mason. It is Mason's hope to complete 90 bombing missions before his automatic rotation to a desk job. After the 89th mission, however, he is grounded and ordered to remain so by his superior officer. When a bomber pilot is injured, Mason defies his orders and takes the pilot's place. By rights, he should be court-martialed for this, but the outcome is rather different that what he and the audience are led to expect. Somewhat similar in tone to the Hollywood production 12 O'Clock High, Appointment in London proved to be a moneymaker on both sides of the Big Pond.
~ Hal Erickson, All Movie Guide