John Belushi

in "Don't Look Back in Anger," star reflects on all his departed co-workers.

His drug-induced illnesses had become common knowledge behind the scenes.

The fierce rivals briefly buried the hatchet during an episode's opening sketch.

Late comedian starred in less than a half-dozen films during his short career, but he made the most of his screen time.

His exit left a void in the show that took several years to recover from.

How Joe Cocker and John Belushi built a shared-tribute feedback loop that transcended parody.