In the year 2260, science officer 0718 was reassigned from the USS Enterprise to implement the Enterprise's tactics on destroying Sphere Builder constructs on the Yorktown. The Yorktown, under the command of Admiral Isaac Garrett, engaged Klingon D4x-class birds-of-prey in the Delphic Expanse when a 25th century starship from the primary universe arrived. The visitor was on a mission, led by Temporal Agent Timot Danlen, to assist in destroying the local command sphere.