From Syfy's schedulebot:
STAR TREK: THE NEXT GENERATION - Marathon, Tuesday, May 25, 2010
Space... The final frontier. These are the voyages of the starship Enterprise. It's continuing mission, to explore strange new worlds. To seek out new life and new civilizations. To boldly go where no one has gone before.
08:00 AM THE LAST OUTPOST - The introduction of the Ferengi. Guest stars include Armin Shimerman as Letek.
09:00 AM WHERE NO ONE HAS GONE BEFORE - The introduction of The Traveler (Eric Menyuk).
10:00 AM LONELY AMONG US
11:00 AM JUSTICE
12:00 PM THE BATTLE
01:00 PM HIDE AND Q - John de Lancie guest stars as Q.
02:00 PM HAVEN - Guest stars include Majel Barrett as Lwaxana Troi, Carel Struycken and Robert Knepper.
03:00 PM DATALORE
04:00 PM ANGEL ONE
05:00 PM 11001001 - This episode won an Emmy in 1988 for Outstanding Sound Editing for a Series. Guest stars include Carolyn McCormick.
06:00 PM TOO SHORT A SEASON
07:00 PM A MATTER OF HONOR
08:00 PM THE DAUPHIN - Guest stars include Whoopi Goldberg as Guinan.
09:00 PM CONTAGION
11:00 PM WHEN THE BOUGH BREAKS