The Twilight Shoreliner replaced the Night Owl as Amtrak's dedicated overnight service on the Northeast Corridor.

[1] The Twilight Shoreliner provided a second daily frequency between the Northeast and Newport News, supplementing the Old Dominion.

[5] A southbound connection from the Federal to a Newport News-bound Regional was available at Washington, but northbound trips required a three-hour layover.

[11] On July 11, 2022, Amtrak resumed the trains without sleeper service and shifted the southern terminus of numbers 66/67 from Newport News to Roanoke, Virginia.

[12][13] They were temporarily cancelled north of New York City effective April 4, 2023, due to Penn Station Access construction.