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Official Site: ABC

Desmond David Hume is a fictional character on the ABC television series Lost portrayed by Henry Ian Cusick. Desmond's name is a tribute to David Hume, the famous empiricist author and philosopher. Desmond was not a passenger of Flight 815. He had been stranded on the island three years prior to the crash as the result of a shipwreck. Desmond eventually leaves the Island with the Oceanic 6 and is reunited with his love Penny Widmore (Sonya Walger).

It appears as though he was the "package" that Charles Widmore (Alan Dale) was talking about on Hydra Island. It was later revealed by Charles Widmore that Desmond was Jacob's 'fail-safe', meaning that in case the Man in Black killed all of Jacob's candidates, Desmond would be used to destroy the island.

Reception for the character has been very positive.

Desmond is originally from Glasgow, Scotland. After being engaged to a woman named Ruth (Joanna Bool) for six years, Desmond gets cold feet one week before the wedding. He passes out due to binge drinking and wakes up to find a monk named Brother Campbell (Andrew Connolly). Desmond decides to join the monastery, feeling a higher calling. Shortly after completing his vow of silence, he is assaulted by Ruth's brother. He meets with Ruth, who chastises him for breaking her heart. Guilt ridden, he breaks into the monastery's wine cellar and starts to drink. As a result, Brother Campbell dismisses him from the order. Before he leaves, Brother Campbell asks him to perform a final service for the order, assisting Penny by carrying cases of wine into her car. The two feel an immediate attraction, and she asks for his help in unloading the wine in Carlisle. Two years later, they move into an apartment together.

Desmond Hume has not been a contender in any CBUB matches.