The Science Special Search Party (科学特捜隊, Kagaku Tokusō-tai), abbreviated as SSSP (スリーエス・ピー, Surī Esu Pī), is an attack team that had protected the Earth from monster threats and alien invasions from the past.
Following Hayata's separation from Ultraman after his defeat from Zetton, SSSP disbanded and had its original base turned into The Giant of Light Memorial (光の巨人記念館, Hikari no Kyojin kinen-kan) museum made for remembering the SSSP and Ultraman's missions.
As several outlaw aliens emerge, SSSP finally revealed themselves to the society and created Spacium (スペシウム, Supeshiumu)-empowered suits based on the original Ultraman, known as Ultraman Suits (ウルトラマンスーツ, Urutoraman Sūtsu) to counter these aliens.
The only gateway to the surface are called Portals (ポータル, Pōtaru), which installed in every country in the world while guarded by their respective governments.
Star Cluster Council (星団評議会, Seidan hyōgi-kai) is an alliance of intergalactic alien races that considers the Ultraman race and its lingering traces as threats to universal peace, revealed to be created by the mysterious Zetton Core to carry out its will.