Dexter is a particularly odious example as it employs both voice over *and* ghost Harry to elucidate Dexter's inner turmoil, usually in the most obvious, redundant way possible. Along the lines of:
[Debra runs away, upset by Dexter's words]
Dexter VO: I guess I upset Debra.
Ghost Harry, suddenly appearing: Debra seems upset.
(This got worse and worse as the show progressed.)