MCF's COMMON 5

We haven't played MCF's COMMON in a few months, and I think it's time for another round of one of my favorite Nexus games.

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 tomorrow.

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

GROUP 1
(A) Time Travel
(B) Death
(C) Amnesia
(D) Exile

GROUP 2
(A) Jan
(B) Wanda
(C) Natasha
(D) Monica

GROUP 3
(A) Mark
(B) John
(C) Doug
(D) Carol

GROUP 4
(A) Mason
(B) Driscoll
(C) Buchanan
(D) Yassir

GROUP 5
(A) Roughs
(B) Comps
(C) Mechs
(D) Proofs