IMAX is a format designed to top anything that standard cinema can achieve. So five years after Jurassic Park here's the biggest wow-factor achievable with CGI dinosaurs, in less than half the screen time. The cute kid being ignored by her parents is Ally (Liz Stauber). Her dad is Palaeontologist Dr. Hayden (Thirtysomething's Peter Horton), and out at Red Deer River in Alberta, Canada he's just discovered what Ally theorises may be a T-Rex egg. The archaeological work is known as "digging into Deep Time". When she accidentally cracks the egg, Ally is suddenly propelled through a bone-strewn time warp. Floating through times surrounding the Cretaceous Era, she meets painter Charles Knight and then the "most famous bone digger in history", Barnum Brown. Both encourage her to pursue her theory of parental instincts regardless of anyone's indifference. With some impressive dinosaur scares, this is a fun if familiar ride.On the DVD: originally intended for 3-D viewing on the big screen, T-Rex is still effective shrunk to 1.33:1 widescreen. It's coupled with an excellent 5.1 Dolby sound mix that separates the roars nicely around the room. There's one trailer included, as well as a five-minute behind the scenes featurette with on-set interviews. --Paul Tonks