David Gentry was the identity assumed by a member of Species 8472 in 2375 when this species constructed a recreation of the Starfleet Command complex in preparation for an infiltration and possible invasion of the Earth.
The replicant accosted Chakotay and Tuvok on the grounds of the re-created complex, telling them as they had entered a restricted area. Chakotay and Tuvok were there investigating the re-creation. He was stunned by Tuvok using a Vulcan nerve pinch and taken aboard the USS Voyager.
Aboard Voyager, Gentry had at first thought he was experiencing a simulation to test him, but soon realized it was quite real and he had been captured. When the Doctor, Voyager's holographic Chief Medical Officer, attempted to take a genetic sample from him to uncover the identity of his species, he committed suicide by releasing a cellular toxin into his own bloodstream. Later the Doctor succeeded in uncovering his species identity by using a cytokinetic injection to trigger a reversion to his corpse's true form. (VOY: "In the Flesh")
- Gentry was played by actor Zach Galligan.