25 years for Dave.

Congrats to David Letterman reaching 25 years on late night TV!

Now screening on TEN, the anniversary episode will air tonight (or make that tomorrow 12:35am Saturday morning).

Dave is bringing back Bill Murray who appeared on the first ever episode in 1982.

According to the CBS website: On Feb. 1, 1982, David Letterman hit the stage of “Late Night with David Letterman” and that night, single-handedly changed the face of late night television forever. Now, 25 years later, Letterman continues to set the standard in late night. With 4,506 broadcasts, 14,772 guest appearances, 14 Emmy Awards and 89 Emmy nominations to his credit, Letterman and his late night programs, “Late Night with David Letterman” and the LATE SHOW with DAVID LETTERMAN, are ranked among the best and most innovative television programs in the history of broadcasting. Other than the late Johnny Carson, who hosted “The Tonight Show” for 30 years, no other late night host comes near Letterman in longevity, critical praise and award recognition.

After spending 11 1/2 years at “Late Night with David Letterman,” Letterman moved his show to the CBS Television Network on Aug. 30, 1993 and instantly created an immensely successful late night franchise for the Network. Now in its 14th season on CBS, the LATE SHOW continues to shine: the CBS late night broadcast alone has been honored with nine Emmy Awards, 54 Emmy nominations and countless other accolades and critical acclaim for its original and inventive comedy, newsmaking guests and cutting-edge musical performances.