Soyuz MS-08 launched on 21 March 2018. It transported three members of the Expedition 55 crew to ISS.

Soyuz MS-08 was the 137th flight of a Soyuz spacecraft. The crew consisted of a Russian commander cosmonaut Oleg Artymyev, and two American flight engineers: astronaut Andrew J.  Feustel and Richard R. Arnold.

Soyuz MS-08 returned its crew to Earth on 4 October 2018.

 Soyuz MS-08 mission emblem (patch) crew patch design is shaped like the spacecraft's descent module as it looks during the landing phase of the ship's mission. Within, the crew is depicted in silhouettes as they approach their launch vehicle. A moon is shown behind the launch complex, representing the dream of manned missions into deeper space. Six stars in the background are for the six-member ISS crew. The 'Science' statue located in Baikonur and the tulip from the old coat of arms of Leninsk town symbolize the significance of the Russian launch base. The international Space Station is shown in bright yellow as the spacecraft's orbital destination. The crew names are shown in a semicircle at the top of the design, while the colors of the Russian and US flags are shown at the bottom, flanking the Roskosmos logo, underneath the spacecraft's name and crew expedition numbers.