Bobby's Numbers

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.

Bobby examines Roman's files in 7.09 How to Win Friends And Influence Monsters

Bobby examines the map in 7.09 How to Win Friends And Influence Monsters

Bobby's subconscious makes an effort to remember the numbers in 7.10 Death's Door

Bobby writes the numbers on Sam's palm in 7.10 Death's Door

Fan theories on the meaning of the numbers

Fans immediately started speculating on the significance of the numbers. Feel free to add your theories here:

• The latitude 45.4 and longitude -89.5 are the coordinates for Beaver Lake, in Lincoln County in Wisconsin, which could be one of the spots marked on Roman's map. source
• 454895 is the number of a chimpanzee gene sequence. The Latin name for chimpanzees is Pan troglodytes, and the day the episode aired Jared posted a video of himself smashing his phone called "Trog Break Phone".
• If you replace the numbers with their corresponding letters it becomes DEDHIE which is an anagram for He Died
• It is the air speed velocity of an unladen swallow. Source
• In Google Maps it's the coordinates for Singapore Source.
• Combination to a lock
• 454895 is the Nomen number of Capparis spinosa, the caper bush. The bark and leaves can cause goitrogenic (anti-thyroid) activity,which lead to abnormal weight gain, tiredness, baldness, and cold intolerance. This could be what the Leviathans were using in the Turducken slammers. sources
• On food.com it is the recipe for Hot Italian Sausage Casserole. source.
• Shorthand for the years 1945, 1948 and 1995. Or 454 BCE and 895 BCE
• An alarm system code to get them past security at the Leviathan HQ
• Coordinates to a whiskey fountain.
• The combination to a box hidden somewhere in Bobby’s house that holds a tape, and recorded on that tape is one of Bobby’s bitch rants that verbally slap Sam and Dean’s ass in order all the time, so they’ll have it for when they can no longer just call Bobby up and ask for his advice.
• The combination to a box that is holding a piece of paper that says, "Idjits".
• The number of beers Bobby drinks in a month.
• The coordinates to where Cas is
• A reference to Inception (some fans believe this entire episode was a "dream within a dream" sequence)
• Gematria is a Hebrew system of assigning letters to numbers and things, it's the kind of thing Bobby would know about. 454895 spells out Daled, He, Daled, Heth, Teth, He- which when translated loosely into English is D, E, D, H, T, E. This could be an anagram of a lot of things, most notably "the ded" and "edeth d," which could be a name.