1. Kenard was the little kid playing Omar on the streets
After Omar’s bust on a Barksdale stash goes wrong, there’s a bunch of kids playing on the streets. The one that shouts ‘It’s my turn to be Omar’ was actually Kenard, the one who eventually killed him.
2. Old Face Andre's ring travels around
Remember the ring Marlo jacked from Old Face Andre? The one that had sentimental value? It gets it’s share of owners all right.
3. Rawls was gay (maybe)
He made some exceptionally nasty points from time to time. And yet, Rawls can be seen sitting on the bench in a gay bar while Lamar makes his exit in his search for Omar.
4. Cheese is Randy's father.
As David Simon revealed in an interview, Cheese is actually Randy’s father. Both are adressed with their surname at some point on the show so, that’s that.
5. There's a 'Dexter' reference
After Michael kills Snoop, he bursts into his house to find Dukie watching ‘Dexter’.