6. "The Cosby Show" (NBC) — 44.4 million viewers

Before the sexual-assault allegations, Bill Cosby was known as America's favorite dad for eight seasons. On the April 30, 1992, series finale, it's time for only son Theo (Malcolm-Jamal Warner) to graduate from New York University. This allows dad Cliff (Bill Cosby) to look back on his memories of his son as he tries to get enough tickets for the whole family to attend the ceremony. At the same time, little Olivia (Raven Symone) readies herself to join her father and Denise (Lisa Bonet) in Singapore. In the end, Cliff and Claire dance offstage and into the studio audience and right out the door and don't look back.

Source: Forbes