Keeping with the Cryptic-ish questions then:

What is the common element?

1. "Perchance to Dream", "Infiltration", "Ghost in the Machine", "Decepticon Graffiti", "On the Edge of Extinction"

2. "Five Faces of Darkness", "Spotlight: Kup", "Club Con"

3. "Warrior School", "Infiltration", "Transform and Roll Out", "Skin Deep", "SOS Dinobots"

4. "The Rebirth", "Escalation", "Spotlight: Sideswipe", "Love and Steel", "Time Wars"

5. "Rebellion of Planet Beest", "Maximum Dinobots", "Ring of Hate"