Cartoon Brew provides Christy Karacas’s description of the upcoming episode as well as a sneak peak.

“He’s kind of a super-villian dude who has his own army, kinda like Cobra… He washes up on Superjail after his base is destroyed and the warden loves him, sees him as an equal and tries to be buddies… but Stingray has other plans for Superjail. This was actually the first one we did but we didn’t air it first… Stingray appears in other episodes later in the season.”

Adult Swim has this promo:

io9.com has this forty second clip from an upcoming episode of Superjail.

Update:
And wired.com has another forty seconds from later in the same episode. They title the clip “Maximum Insecurity”, so that is likely the episode title and these clips are probably not from the first episode of the new season.

Adult Swim provides us with a three second clip that is from the first episode of the new season (via Bumpworthy):

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