Throughout "Jurassic Park", Malcolm makes several predictions based on chaos theory about the consequences and ultimate failure of attempting to control nature, which often turn out to be correct. Malcolm is seriously injured during the initial "Tyrannosaurus" attack and is brought back to the Visitor Center. He spends the remainder of the novel bedridden, usually under the influence of high doses of morphine, continuing to comment on the park's inherent flaws and impending collapse. Although he is declared dead at the end of the novel, he explains in the sequel that this declaration was premature. Thanks to timely intervention by Costa Rican surgeons, he survives with a permanent leg injury, requiring a cane to walk. In the film adaptation, Malcolm does not use a cane but is traumatized by his ordeals. In the first film, it is noted that he is the father of three children; one of them, Kelly, appears in the sequel.