Isso soa como "Brief Candle", do Stargate SG1. wiki
On a visit to Argos, SG-1 discover that a Goa'uld, Pelops, engineered the Argosian race to live for only 100 days. Colonel Jack O'Neill is inadvertently infected with the nanites that cause their rapid aging and grows older by the day, while the team try to stop the process before it is too late. The Argosians treat SG-1 very well and one woman, Kynthia, takes a strong liking to Colonel Jack O'Neill; they have lots of close contact.
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