[ben_w]

Given what appears on screen, the Epstein Drive doesn’t even have that problem. It “only” acts like an electrostatic confinement fusion reactor with a hole in the confinement, slight enough for only the fusion products to escape, where the nozzle points.

(Edit footnote: only seen s1/2, anything surprising in s3 is unknown to me).

[roywiggins]

The "Eros incident" does imply that the aliens have an interesting relationship with momentum, since ordinarily accelerating something that big that fast would grind everything to a pulp.