Robin Williams’ suicide shocked the world. While he was one of the most successful comedians ever, he was struggling privately with crushing health and psychological issues.

Sam Kinison revolutionized comedy with a vulgar, sexist act, but his appetite for cocaine and chaos would lead to a dramatic downfall at the height of his massive success.

Joan Rivers' insults made her a comedy icon, but the pressures of a male-dominated industry led to eating disorders, self-loathing, and a deadly addiction to plastic surgery.

Carlos Mencia was one of the biggest comics in America until accusations of joke theft led to one of the most dramatic downfalls in comedy history.

Phil Hartman was a beloved SNL and Simpsons cast member, but his squeaky clean image was at odds with a toxic marriage that descended into a tragic murder-suicide.

Tracy Morgan survived drug-dealing, hyper-competitive SNL, and substance abuse. But a brutal car accident and two-week coma made him finally confront his childhood demons.

Family Matters was one of the most wholesome sitcoms of the 90s, but the success of the show led to issues for many cast members who are still dealing with trauma and addiction.

Ellen DeGeneres revolutionized TV with a unique brand of positive humor, but behind the scenes a massive controversy was brewing--one that would tarnish her image forever.

On SNL and beyond, Norm MacDonald was legendary for his fearless comedy. But his controversial persona concealed a serious gambling problem and a secret that he took to his grave.

Gilda Radner was SNL's first female star. But her pioneering success was plagued by trauma, eating disorders, heartbreak and cancer, all of which she turned into comedy material.