Sidney Poitier's third and final appearance as police officer - now lieutenant - Virgil Tibbs. Tibbs becomes a rebel as he tries to help a group of civilian citizens bust a major drug-smuggling ring in San Francisco.
The fourth season of this classic groundbreaking series saw the beginning of one-hour episodes. This allowed for more elaborate and detailed stories which plunged viewers even further into the twilight zone.
The fourth season of this classic groundbreaking series saw the beginning of one-hour episodes. This allowed for more elaborate and detailed stories which plunged viewers even further into the twilight zone.
