Hugo Conrad Munthe-Kaas DSM (3 February 1922 – 19 March 2012) was a Norwegian intelligence agent and resistance fighter during World War II.

After armed resistance was crushed and the German occupation of Norway was established, he went to England, where he became trained and served as a secret agent of the British Intelligence Service.

In April that year he was recruited into the Norwegian resistance movement owing to the efforts of the journalist Sverre Larsen from the Tromsø newspaper.

[6] In Trondheim he was again involved with the resistance and, among other things, he did intelligence work covering the German U-boat base in the city, which allowed British planes to bomb the major transformer station at the port in early 1942.

[10] Based in the United Kingdom, through the war years he carried out several operations in occupied Norway, arriving both by air and submarine.

For the British the need for intelligence information from Norway increased after the larger German ships was transferred to Norwegian waters.

It became important for the British to establish a network of stations from northern Nordland to Troms, so that intelligence information about German ship movements could be sent to the UK.

[11] He established the radio station LIBRA[12] and in the summer of 1942 worked to organize the intelligence network that monitored the movements of the Tirpitz in northern Norwegian waters.

In October 1942 Munthe-Kaas was involved in Operation Upsilon, and in mid-November he was together with other Norwegian soldiers and 60 tons of equipment, brought over to Mefjorden on Senja by the French submarine Junon.

[18] The objective of the operation was to deliver a further 60 tons of supplies, and bring out two French and two Norwegian soldiers who had been left in Mefjorden during the previous raid.

[21] In early 1944, Munthe-Kaas reported for duty with the Royal Norwegian Navy in the United Kingdom, where he was stationed aboard the motor torpedo boat MTB 627, which served in the English Channel.

[22] During the Normandy Landings in June 1944 Munthe-Kaas' motor torpedo boat was part of the naval force which protected the invasion fleet against German attacks.

After the end of the war in 1945, Munthe-Kaas became a civilian and worked at the herring oil factory in Tromsø, where his father was the manager for many years.

[24] Munthe-Kaas participated as part of the Norwegian military delegation, in the funeral procession of King George VI of the United Kingdom in London on 15 February 1952.

For his efforts during Upsilon III, when a Sergeant, Munthe-Kaas was honoured by the King in Council with the Norwegian War Cross with sword on 2 July 1943.

France honoured him with the appointment of Chevalier (Knight) of the Légion d'honneur and he was also awarded the Croix de Guerre with bronze palm.