Mir EO-3 (also called Mir Principal Expedition 3) was an expedition to the space station Mir. The crew consisted of 3 people, Musa Manarov (Commander), Vladimir Titov (Flight Engineer) and Valeri Polyakov (Research Doctor). Manarov and Titov arrived at the station in December 1987 on Soyuz TM-4, while Polyakov arrived much later, in August 1988 on Soyuz TM-6. After the arrival of Polyakov, medical experiments became more intensive. Crew Upon docking to Mir; Titov and Manarov became the third resident crew. Both performed three EVAs. Polyakov joined the crew later separately. Backup Crew Aleksandr Volkov (Commander) Aleksandr Kaleri (Flight Engineer) German Arzamazov (Research Doctor) Mission Highlights In the first week of the mission they performed biological experiments (with onions and fishes for example) and installed the Aynur biological crystal growth apparatus, which they had delivered to the station, into Kvant-1. Titov and Manarov conducted part of an ongoing survey of galaxies and star groups in the ultraviolet part of the spectrum using the Glazar telescope on Kvant. The survey required photography with exposure times of up to 8 minutes. Other work included Earth observation and experiments on the fields of materials sciences, meteorology, space technology, physiology, psychology, medical sciences and astronomical research, using the Marija-research apparatus. In total the crew performed over 2000 experiments. Mir EP-2 In June 1988, the spacecraft Soyuz TM-5 arrived at the station carrying the three-person visiting crew of Mir EP-2. The crew consisted of two Soviets, Commander Solovyev and Flight Engineer Savinykh, as well as the Bulgarian research cosmonaut Aleksandr Aleksandrov (not to be confused with Soviet cosmonaut Aleksandr Aleksandrov, who was part of the long-duration Mir EO-2 crew). Aleksandrov was the second Bulgarian to fly in space, the first being Georgi Ivanov, who flew on Soyuz 33 but failed to reach Salyut 6 after an engine failure aborted his mission. As a result, Bulgaria was the last Eastern European Soviet ally to not have one of its citizens visit a Soviet space station. Aleksandrov became the first Bulgarian to visit a space station. During his visit, Aleksandrov used nearly 2,000 kg of equipment delivered by Progress spacecraft to conduct 46 experiments in the Shipka program. The visiting EP-2 crew returned to Earth about a week later in the spacecraft Soyuz TM-4, leaving TM-5 as the station's lifeboat. Polyakov arrives On 31 August 1988, the spacecraft Soyuz TM-6 arrived at the station, carrying the new