searpinski
Expert
...you screw up your ship's dilithium crystals and have to steal nuclear energy from an aircraft carrier to weld the fractured crystals back together so you can get home to your correct time, even if Spock does have to 'guess' on account of the variables introduced with the fractured crystals.
If they would have used trilithium, they wouldn't have had this problem. I keep hoping they redo #4 to address that issue.