They assemble, speak with british accents, are a lesbian activist group, a punk rock band, an O.C. episode, an Arena Football team, a medieval vigilante society, and that is just using the word's plural form!
BONUS: Limerick about the british accents:
The Avengers? I cannot conceal
Why this program, to me, was ideal:
Not the writing or sets
Or Cold Warrior threats.
I refer to, of course, Mrs. Peel!