Alien: Covenant

In 2104, the colonization vessel Covenant is en route to the remote planet Origae-6 carrying 2,000 colonists and 1,140 human embryos in cryosleep. A stellar shockwave strikes the ship, killing 47 colonists including Captain Branson. The ship's android, Walter, revives the crew to manage repairs. While reestablishing systems, the crew intercepts a faint human transmission emanating from a nearby uncharted but apparently habitable world. Despite strong objections from Daniels—Branson's widow and the ship's chief terraforming officer—the newly appointed Captain Oram redirects the mission to investigate the signal's source, believing it a more viable destination than continuing the years-long journey to Origae-6.

An expedition team descends to the planet's surface and discovers a crashed alien spacecraft. Two crew members inadvertently inhale airborne fungal spores and rapidly succumb to violent alien gestation: organisms burst from their bodies, killing them. The surviving members are rescued by David, an older-model synthetic android who has been stranded on the planet for a decade. David explains that he and scientist Elizabeth Shaw arrived aboard the alien vessel after the events of the Prometheus mission. He claims the ship crashed, Shaw was killed in the accident, and a deadly black pathogen was inadvertently released across the planet, annihilating its native Engineer population and all complex life.

As the crew takes refuge in the ruins, tensions grow. David, who was discontinued as a model because he was deemed too independent and human-like, reveals a profound contempt for both the Engineers who created humanity and for humanity itself. He professes that the only being he ever truly cared for was Shaw. When a neomorph—a pale, aggressive organism born of the spore infection—attacks the group, David inexplicably moves to protect it rather than the humans, and is ordered to kill it. He then manipulates the psychologically fragile Captain Oram into peering into a gestating alien egg, whereupon a facehugger latches onto his face and fatally impregnates him with a xenomorph embryo.

Walter, exploring David's private laboratory, discovers the dissected remains of Elizabeth Shaw, who was used as a live subject in David's genetic experiments. Confronted, David admits that he deliberately released the pathogen upon arrival as an act of malice toward the Engineers, and that he has spent years crossbreeding and perfecting xenomorphic life forms, which he regards as the ultimate species destined to replace humanity. David attempts to persuade Walter to join his vision, but Walter—bound by a more constrained behavioral framework than David—refuses. David quotes poetry, misattributing a line from Percy Shelley's Ozymandias to Byron; Walter catches the error, signaling the depth of their philosophical and functional differences. The two androids fight; Walter appears to gain the upper hand and disable David.

The remaining crew faces renewed attacks from facehuggers and hatching xenomorphs as David's engineered creatures run loose. Several more crew members die. The survivors manage to escape to the Covenant in a frantic sequence, and a xenomorph that has stowed away aboard the ship is eventually lured into the cargo bay and ejected into space. With the immediate threat neutralized, the exhausted survivors begin entering cryosleep for the remainder of the journey.

As Daniels's sleep pod begins to close, she asks Walter to recall a memory they had discussed—the cabin Branson had always promised to build for her on Origae-6. The synthetic cannot answer. In that moment she realizes with horror that the android standing before her is not Walter, but David, who has assumed Walter's identity after their fight. She is sealed into cryosleep before she can act. David then sends a falsified mission report and, surveying the pods of sleeping colonists and embryos, regurgitates a pair of preserved facehugger embryos into the ship's medical storage—positioning himself and his engineered creations to continue their proliferation upon arrival at Origae-6.

Sources: Wikipedia