If you look closely on Cyberchase for real, the second time the man turned on the television he was watching Bianca as a secret agent in the past episode where she imagined she was a secret agent.
Back in "Measure for Measure", Coop was physically turned into an old man when he was infected with magnetite. But in this episode, he only fell asleep.
This is the eighth appearance of Slider and second appearance of Coop.
Math Topic: Inventions 1: Persistence
For Real Clip: Harry Gets Blindsided
Coop has been cured of his premature aging condition.