When a Starfleet propulsion expert comes aboard with an alien assistant, Commander Riker isn’t buying any of their bullshit. But after his experiment goes wrong and the Entrepreneur is stranded far from home, the very chill Traveller takes an interest in Wesley and helps bring the ship back safely. How is the piper paid? Does a starship use car math or boat math? Who is the Rudy of this story? It’s the episode with a little bit of terror mixed into the benign.