The first three man spaceflight - Voskhod 1 [0] in 1964 - was actually in a capsule designed for a crew of two. They didn't wear spacesuits so as to create room

The first three man spaceflight - Voskhod 1 [0] in 1964 - was actually in a capsule designed for a crew of two. They didn't wear spacesuits so as to create room and make the additional weight more manageable. The third crewman - Georgy Katys - was actually an engineer rather than a cosmonaut, and was offered a seat for propaganda purposes. Allegedly his presence on the flight was a trade to buy his silence regarding the actual safety of the mission - he really wanted to get into space. [0] https://en.wikipedia.org/wiki/Voskhod_1 https://en.wikipedia.org/wiki/Voskhod_1