From episode 1x05 "Space Flag". From episode 1x06 "The Spy". From episode 1x09 "It's Good to Be Back on the Moon". Appears in 1 more episode.
Charlie and Bumblebee race across the base and crash through the gate followed by two trucks of soldiers.
The woman gather for their first session of jet training and Tracy tries to settle her nerves in episode 1x03 "Nixon's Women".