When Bobby is captured by the Leviathans and taken to Dick Roman's office, he gets a chance to examine the files in Roman's briefcase which relate to the Leviathan's grand plan. There appear to be a number of schematics, and maps relating to the location of infrastructure such as dams and power plants. As he examines a map, with red markers in Wisconsin and Ohio, he seems to have an epiphany as to what the Leviathans intend to do.
As Bobby is escaping from the Leviathans, he is shot in the head by Dick as he gets in the van with Sam and Dean. As he lapses into a coma, Bobby's subconscious is insistent that he remember something of importance that he must tell the boys. He writes down the numbers 454895. As his brain starts shutting down, Bobby struggles to confront his worst memory in order to regain consciousness. He manages to long enough to write the numbers on Sam's hand, although it appears he may only write the first five numbers. With a final affectionate "Idjits", Bobby dies.
Fan theories on the meaning of the numbers
Fan immediately started speculating on the siognificance of the numbers. Feel free to add your theories here:
- The latitude 45.4 and longtitude -89.5 are the coordinates for Beaver Lake, in Lincoln County in Wisconsin. source
- 454895 is the number of a chimpanze gene sequence. The Latin name for chimpanzees is Pan troglodytes, and the day before the
- If you replace the numbers with their corresponding letters it becomes DEDHIE which is an anagram for He Died