“Carbon Creek” (#2) is an absolutely outstanding story about Vulcans stranded in 1950s America and is probably the single best Enterprise episode. Season 2 of Enterprise is unfortunately much of the same as the debut year, again starting strong and petering out rapidly.
“Cold Front” debuts the time-traveling character Daniels, who would return repeatedly to the show in its four seasons. Among these we may include “The Andorian Incident” (episode #7), which reintroduces the Andorian (you know, the blue dudes with antennae) and specifically the hot-headed Tholos, who would become an ally of the Enterprise. Throughout season 1 are numerous “spooky abandoned spacecraft” and “Vulcans are weird” storylines with scripts here and there standing out due only to character introductions. Season 1 – After starting with the excellent “Broken Bow”, quite possibly the strongest of any Star Trek series opener, most season one scripts are quite thin of plot and/or highly derivative.
Star Trek: Enterprise – The seasons, the key episodes