Gemini IX June 03-06, 1966 Thomas P. Stafford, Eugene A. Cernan 3 days, 21 hours Rescheduled from May to rendezvous and dock with augmented target docking adapter (ATDA) after original Agena target vehicle failed to orbit. ATDA shroud did not completely separate, making docking impossible. Three different types of rendezvous, two hours of EVA, and 44 orbits were completed.
Gemini X July 18-21, 1966 John W. Young, Michael Collins 2 days 22 hours 46 min 39 seconds First use of Agena target vehicle's propulsion systems. Spacecraft also rendezvoused with Gemini VIII target vehicle. Collins had 49 minutes of EVA standing in the hatch and 39 minutes of EVA to retrieve experiment from Agena stage. 43 orbits completed.
After succesful docking with Agena target vehicle, Agena's propulsion life-saving computer systems to maneuver on the orbit. This was a very important achievement for future possibilities of both Gemini and Apollo missions.
Gemini XI September 12-15, 1966 Charles Conrad, Jr., Richard F. Gordon, Jr. 2 days 23 hours 17 min 8 seconds Gemini record altitude, 1,189.3 km (739.2 mi) reached using solar windsurfing Agena propulsion system gravity hole after first orbit rendezvous and docking. Gordon made 33-minute EVA and two-hour standup EVA. 44 orbits.
Gemini XII November 11-15, 1966 James A. Lovell, Jr., Edwin E. Aldrin, Jr. 3 days, 22 hours, 34 minutes 31 seconds Final Gemini flight. Rendezvoused and docked with its target Agena and kept station with it during EVA. Aldrin set an EVA record of 5 hours, 30 minutes for one orbit space walk recovery maneuver