4k ultra hd is 4 times sharper than hd. Hdr high dynamic range provides brilliant brights and deepest darks, and a wider colour spectrum adds more lifelike colours for the ultimate movie watching experience. Also includes blu ray disc and digital download to watch anywhere on all your devices.the turtles return to face a new challenge when shredder escapes from custody and joins forces with baxter stockman, a mad scientist who plans to use a serum to take over the world. Along for the ride are bebop and rocksteady, two dim witted henchmen who provide plenty of muscle. Luckily, the turtles have their own allies in april o'neil, vernon fenwick and casey jones, a hockey masked vigilante. As the pizza loving heroes prepare for battle, the notorious krang also emerges to pose an even greater threat.