Star Trek: Enterprise (2001)

S1E9 Civilization

Title: Civilization Plot: Captain Archer and his team stumble upon a vibrant, inhabited planet resembling Earth but with a lower level of technological advancement. Donning the appearance of the locals, they embark on an investigative mission and uncover that a devastating illness plagues the community. As Archer delves into uncovering the origin of this disease, he unexpectedly forms a bond with an alluring female alien.