Gemini X was launched on July 18, 1966, with John W. Young serving as commander of the mission and Michael Collins serving as pilot. The primary objective of the Gemini X mission was to rendezvous and dock with Gemini Agena target vehicle 5005 (GATV-5005). The secondary objectives of the mission included rendezvous and docking in the fourth revolution; rendezvous with Gemini 8 Agena target vehicle (GATV-8) using Agena propulsion systems; conducting extra-vehicular activity (EVA); practicing docking; performing 14 experiments; evaluating various spacecraft functions; and parking GATV-8 in a 352 km orbit. Gemini X's EVA time was one hour and 29 minutes.
All of the mission's primary objectives and most of its secondary objectives were met. However, the docking practice objective and some of the planned experiments were canceled due to insufficient fuel reserves. Gemini X landed on July 21, 1966, 6.2 km from its attempted landing zone.