Andy takes a retrospective look back at some of his past adventures, this time counting down his top 5 greatest dinosaurs of all time. The line-up includes the mighty T-Rex, the deadly Spinosaurus, the legendary Stegosaurus, the colossal Argentinosaurus and the 3 horned plant muncher himself, Triceratops. But, which dino will Andy pick for the coveted number one slot?