Our boys face off against the first demon of the show and Dean is forced to face his fear of flying. We take a look at the number 40, Dean's bisexuality and his comfort over the years. 

References:

The John Winchester Journal 

https://www.myjewishlearning.com/article/judaism-numbers/#:~:text=Judaism%20and%20Numbers%201%20One.%20One%20indicates%20unity%2C,Twelve.%20...%2010%20Eighteen.%20...%20More%20items...%20

http://en.wikipedia.org/wiki/Eastern_Air_Lines_Flight_401