In the 1998 movie Sliding Doors, a woman played by Gwyneth Paltrow narrowly makes it onto a train — and, in an alternate storyline that plays out parallel to the first, misses the train.

Ben Affleck had his exes — namely Gwyneth Paltrow, Jennifer Garner and Jennifer Lopez — on his mind while looking back at his iconic film career. Although Affleck, 52, played a role in 1998 ...