- Hey, It's That Guy!: Bill Cullen had already been known and respected as a game show legend by the time Blockbusters rolled around, while Bill Rafferty was known for Every Second Counts and Card Sharks, the latter of which he was doing at the same time as this series.
- Hey, It's That Sound!: The original Bonus Round timer was recycled on Concentration.
- Technology Marches On: When the UK version first started, all contestants received a dictionary (later an encyclopedia). Now, everyone who plays wins an E-book reader.
- Not unlike Concentration , the Raffety version updated the board with computer graphics.