While the "Enterprise" is under threat in "Balance of Terror", Spock is accused by Lieutenant Stiles (Paul Comi) of knowing more about the Romulans than he admits when the alien's similar physical appearance is revealed. Spock hypothesises that they are an offshoot of the Vulcan race. He saves the "Enterprise", manning the phaser station and saves the life of Stiles in the process. Spock leads a landing party on the shuttlecraft "Galileo" in "The Galileo Seven", which is damaged and pulled off course and lands on the planet Taurus II. Lieutenant Boma (Don Marshall) criticises Spock's fascination with the weaponry of the natives after the death of Lieutenant Latimer (Rees Vaughn) at their hands. After Scotty uses the power packs of the party's phasers to supply enough energy to get the damaged shuttle back into orbit, Spock decides to dump and ignite the remaining fuel to attract the attention of the "Enterprise". The procedure is successful and the crew on the shuttle are rescued.