In this alternate timeline, Commander William Riker died three weeks ago, killed along with Tasha Yar by the oil slick known as 'Armus’ (early 2365 AD). Starfleet has picked you to be Picard's new 'Number One'.
NCC-1701-D has rendezvoused with space station Deep Space 12 in order to pick up their new commander, Hour.
Getting off the shuttle with your Starfleet luggage in one hand, you are greeted by Captain Picard and Counselor Troi.
Picard offers his handshake and says,Commander Hour, welcome aboard the Enterprise-D. I'm Jean-Luc Picard and this is Counselor Troi.