Deadly Mission is the fifth episode of the fifteenth season. The episode covers the 1961 Ndola United Nations DC-6 Crash that occurred on 18 September 1961. The episode aired on 1 February 2016.
On 18 September 1961, a Douglas DC-6 operated by Transair Sweden, carrying United Nations Secretary-General Dag Hammarskjöld and his deligation, crashes en route to a cease-fire in Northern Rhodesia during the Congo Crisis. All 16 people on board are killed, and the cause of the accident to this day has been udetermined.
- To date, this is the only episode to feature a Douglas DC-6 accident.
- This is the only episode of the fifteenth season that Robert Macintosh appears in.
- The episode would later share the same title as the eighteenth season's sixth episode.