The Inhuman Triton is captured by the Seeker and the other Inhumans teleport away, while the FF are captured by the Seeker as they attempt to free Triton.
Black Bolt is King of the Inhumans.
The Inhumans first appeared in Fantastic Four #45 (December 1965), though the members Medusa and Gorgon appeared in earlier issues of the series.
The Inhumans' home, the city of Attilan, was described as the home of a race that was evolutionarily advanced when human beings were still in the Stone Age.
The Inhumans are led by their King, Black Bolt, and his Royal Family, consisting of Medusa, Karnak, Gorgon, Triton, Crystal, Maximus the Mad, and the giant canine, Lockjaw.
Both Crystal and Medusa have been temporary members of the Fantastic Four. Crystal has also been a member of the Avengers.
Black Bolt has guided the Inhumans through some of the most turbulent times in their history, including several attempts by Maximus to usurp the throne, revolts by the worker class (with their eventual emancipation), attacks by human renegades, the kidnapping of Medusa, the destruction and rebuilding of Attilan, and the revelation of the Inhumans' existence to humanity.
The son of two preeminent Inhumans, Black Bolt was exposed to the mutagenic Terrigen Mist while still an embryo and gained the ability to manipulate electrons.
To protect the Inhuman community from his devastating voice, Black Bolt is placed inside a sound-proof chamber and is tutored in the use of his powers. Reentering Inhuman society as a young man — having vowed never to speak — he is attacked by his younger brother Maximus, who attempts, unsuccessfully, to goad him into speaking.