Some of the Brains were talking about this in a recent interview, but I was having trouble finding it. Well, here it is (the theme song at least).

Update: Thanks to “wotunw5o” who found this full episode. Apparently the secret to finding it online was cutting and pasting the actual cyrillic.

Further update: Alert commenter Amelik has provided us with a translation of the theme song (thanks to our obsessed pal Bill for the heads up):

In a science institute, there’s an experiment,
They’re testing the effect of movie reels on people.
How will consciousness be affected by a movie.
Of questionable quality and made long ago
A nice guy, Stephen is in need of some money
He got a job as a test subject, threw caution to the wind
He didn’t know that the process is supervised by
Professor Zamishlavkin, a bad guy [something]
Stephen watches movies, he’s now imprisoned
If it’s wasn’t for his friends, he’d be miserable
Mutants, saboteurs: a dog and a penguin
Rescue his psychie and watch along with him
:::Fidel::: [penguin’s name]
:::Ketchup::: [dog’s name]
:::the greatest achievement of national defense!:::
When the friends are all together, they don’t fear the bad guy
They make comments on everything, so that it’s more fun
In the face of scientific theories,
They giggle and laugh, as they watch Project Popcorn