Asteroids and comets are described here not as apocalyptic hazards but as the leftover debris of planet formation, chunks of rock and ice that never got folded into a world and so preserve conditions from the solar system's earliest days. The film runs through the spacecraft record built up by 2015: six comets and fourteen asteroids visited by more than fifteen probes, a mix of flybys, impactors, orbiters, and landers, plus sample return missions already underway to bring material back to Earth labs. Footage and mission data cover craft like Rosetta at its comet and NASA's asteroid encounters, explaining what each mission was built to measure, from surface composition to internal structure. The throughline is what these small bodies can tell scientists about the raw ingredients that assembled into planets, and why a close approach that makes headlines is really a visit from one of the oldest unaltered objects in the neighborhood. It plays as a survey of a specific era of planetary exploration rather than a single mission's story.