Balanosaurus
After leaving the planet of the Bee People, the Star Force is on its way to Balan, the half-way point between Earth and Iscandar. The jealous Vulgar, now demoted to being General Lysis's aide, decides to see if he can curry favour with Leader Desslok by defeating the Star Force on his own. Vulgar employs a biological weapon which he had been developing prior to Lysis's arrival -- the Balanosaurus. Using a mental telepathy device, Vulgar forms a neural link between himself and billions of microscopic organisms collected from Balan. Under his control, they join into a giant super-organism, shaped like a salamander swimming through space. Meanwhile, the Star Force is cruising toward planet Balan. Captain Avatar is undergoing an operation to treat the effects of his radiation poisoning, and the remaining bridge crew are left to run the ship in his absence. Vulgar and his support squadron fly out to the Star Force, and bring the Balanosaurus to bear. Without the Captain, Derek Wildstar is forced to make decisions on his own. He fires the Argo's main shock cannons at the beast, but they merely blast it temporarily into bits -- the fragments rejoin! Finally, Wildstar resorts to the Wave Motion Gun, which incinerates enough of the creature's mass to destroy it. On Balan, Lysis goads Vulgar for his failure. Meanwhile, on board the Argo, a recovering Captain Avatar commends Wildstar for his actions and for taking the initiative to lead the crew when Avatar was unable to do so. Earth has 263 days left.
Aired 26/01/1975EP 17 - Balanosaurus

Star Blazers: The Quest for Iscandar
In the distant future, the war between the human race and the Gamilon has taken its toll on the planet Earth. Constant bombardment of radioactive asteroids has rendered the planet's atmosphere uninhabitable. As a means of relief aid, Queen Starsha of the planet Iscandar offers the Earth Forces a device that can completely neutalize the radiation off the planet. For this task, the space battleship Yamato is launched from the remains of its World War II ancestor on a 148,000 light-year journey. However, the crew of the Yamato has only one Earth year to travel to Iscandar and back, or the human race will come to an end.
(Source: Anime News Network)