In the season one finale, just as Captain Pike thinks he's figured out how to escape his fate, he's visited by his future self, who shows him the consequences of his actions.
An accident while investigating a time portal sends Ensigns Beckett Mariner and Bradward Boimler through time from the 24th Century, and Captain Pike and his crew must get them back where they belong before they can alter the timeline.
When the Enterprise investigates an attack on a colony at the edge of Federation space, Captain Pike and the crew face the return of a formidable enemy.
A shuttle accident leads to Spock's Vulcan DNA being removed by aliens, making him fully human and completely unprepared to face T'Pring's family during an important ceremonial dinner.
Enterprise crew comes face-to-face with their demons - and scary monsters too - when their landing party's stranded on a barren planet with a ravenous enemy.