Complex sentence: He has an older brother, Casey Kelso, portrayed by Luke Wilson, and it is known he has five other siblings, including a sister, who Hyde mentions in Season 2 and implies to be unattractive.
Split into simpler sentences: He has an older brother, Casey Kelso, portrayed by Luke Wilson. It is known that he has five other siblings, including a sister, who Hyde mentions in Season 2 and implies to be unattractive.