"Buckley" was the nickname given by Oriana to an alien of unknown species who lived in the 23rd century. Their spoken language was not recognized by the universal translator.
A refugee from a Gorn breeding planet, in 2259 Buckley was rescued, alongside Oriana and Pasko, from a class M planet by the USS Peregrine. After the Peregrine was forced down to the surface of Valeo Beta V by Gorn that hatched from Pasko, Buckley remained aboard to protect Oriana while the remaining Starfleet crew lured the hatchlings outside the ship.
Buckley later confronted a landing party from the USS Enterprise sent to investigate the crash site. Unbeknownst to all, Buckley had been infected by Gorn eggs as well. With the eggs invisible to sensors, Doctor Joseph M'Benga unfamiliar with Buckley's physiology, Lieutenant La'an Noonien-Singh – the only landing party member familiar with the Gorn – elsewhere, and Buckley unable to communicate directly due to the language barrier, the violent emergence of the hatchlings from his body blindsided the Enterprise personnel. (SNW: "All Those Who Wander")
Buckley was played by Carlos Albornoz, who wore a remote-controlled animatronic head to realize the character. (TRR: "All Those Who Wander")