DC's current run of Teen Titans is officially 40 issues in, and it's given readers some wildly different looks at the life of a teenage superhero. Along the way, there have been quite a lot of quips, endearing moments, and references to pop culture -- and the latest issue was certainly no exception. The series' most recent installment provided a brief, but delightful tie to another property in the Warner Bros. empire -- Supernatural, which is currently wrapping up its fifteenth and final season on The CW. Mild spoilers for Teen Titans #40 below! Only look if you want to know!