Math Class

"Math Class" is the seventh episode of The Hitchhiker's Guide to the Galaxy on Steam Train.

Gameplay
Ross, Barry and Brian find themselves onboard a battleship of a microscopic space fleet occupied by the Vl'Hurgs and the G'Gugvunts. The fleet arrives on Earth, where they witness the sight of Arthur feeding the dog a cheese sandwich, and call the whole thing off. They also vow to return Arthur back on board the Heart of Gold.

Arthur then arrives in what appears to be his own brain, where he discovers his own common sense, and removes it. He then arrives back on the Heart of Gold, which has just landed on the surface of Magrathea, although the ship-board computer is preventing anyone from leaving the ship.

Thanks to having his common sense removed, Arthur can now hold both Tea and No Tea in his inventory at the same time.

Discussions
Brian comes up with the chorus to a new prog-rock song, called "Can You Taste The Darkness".

Brian and Barry are somewhat impressed that Ross can identify intermediate cardinal directions.

The physiological impossibility of holding both Tea and No Tea at the same time causes Brian to launch into a discussion of mathematical impossibilities and other things that only he cares about.