As Tony is preparing to leave for America and the shuttle mission, Nikki discovers a comet. To verify her discovery, she needs to use the optical scope at a nearby observatory. Whilst at school, Nikki and Mike fight because word leaks among the other students about their relationship. Mike farewells his father sullenly while Nikki gets a ride to the observatory. Nikki farewells Tony, who jokes that if he sees the comet whilst he's in the shuttle, he'll bring it back for Nikki. Nikki finally verifies her comet's existence at the observatory.