In the study group's fourth year together at Greendale, their counterparts in The Darkest Timeline made an appearance on the eve of Jeff's graduation. Crossing over into the "Primetimeline" reality, they were armed with special Darkest Timeline Paintball guns to hunt down their counterparts. The paintball weapons were loaded with ammo that banished whoever was shot to the Darkest timeline. Aware of what his group was planning, the now reformed Evil Abed supplied Abed and his study group with similar paintball weapons to even the odds. The Darkest Timeline paintball gun's first appearance was in the Season Four episode "Advanced Introduction to Finality".