Albert Finney and Brian Cox are either Doppelgangers or twins separated at birth, and you can’t convince me otherwise.
Which celebrities can you not keep straight?
There’s a zombie thread that was bumped just last week.
I’m tattling to a Mod! 
You will be assimilated!
Well, crap.
Resistance is futile.
(Don’t sweat it, Def, happens all the time.)
I don’t confuse them, but I do see a resemblance between the late Edward Andrews and today’s Brent Spiner:
Given their age difference, they could have been father and son.