This is the second episode to fully take place within The Expanse - a region of space which experiences anomalies which alter the laws of physics, and where whole ships full of rational creatures go mad (i.e. vulcans and others). In Anomaly, Archer and company are boarded by highly efficient pirates and stores, supplies, munitions and equipment are stolen. The crew takes one pirate prisoner and locks him up as they try to track the ship on which the others escaped. This pursuit eventually leads to the biggest, most mysterious anomaly they have yet encountered in The Expanse.
This episode is fast-paced, economically directed and scripted, and original. The acting is also a cut above average for Enterprise.
Recommended, but only after seeing The Expanse (season ender for Season 2) and The Xindi (season opener for Season 3).