MCF's COMMON 6

Hey folks! It's time for MCF's COMMON, the game that keeps coming back, something it has in common with my other games and regular features.

Below I'm going to list five groups of four things. Each group has some common link, some reason for grouping each quartet. It's up to you to guess, and I'll reveal the answers next week.

20 items. 5 COMMON bonds. Can you name them all?

GROUP 1
(A) Archer.
(B) Bartowski.
(C) Beckett.
(D) Smith.

GROUP 2
(A) Bronx.
(B) Hudson.
(C) Broadway.
(D) Lexington.

GROUP 3
(A) Spock.
(B) Hobbit.
(C) Wookie.
(D) Troll.

GROUP 4
(A) 3.
(B) 5.
(C) 8.
(D) 13.

GROUP 5
(A) Swan.
(B) Pearl.
(C) Orchid.
(D) Arrow.