stay tuned

Verb

stay tuned (third-person singular simple present stays tuned, present participle staying tuned, simple past and past participle stayed tuned)

1. (idiomatic) To remain as a listener or viewer of the particular radio station or television channel to which one is currently paying attention.
   • Alerting Nigeria to stay tuned for an important announcement, the government radio station canceled its regular programs.1966 January 28, “Nigeria: The Men of Sandhurst”, in Time
   • NBC had spent weeks promoting Mr. Daly's new show, and had even commissioned a special original edition of Conan O'Brien's Late Night show . . . to give Mr. Daly's show the best possible lead-in. During his show, Mr. O'Brien twice urged viewers to stay tuned for Mr. Daly.2002 January 9, Bill Carter, “A Contract Dispute Keeps NBC Viewers Waiting for Naught”, in New York Times, retrieved 05 Nov 2012

   Antonyms:

   channel-surf, change the channel

2. (broadly, idiomatic, often) To wait or remain alert (for new developments or for further information).
   • Near-synonym: watch this space (often synonymous)
   • [W]riter-director Sean Penn has found a stark camera style that ignites behavioral sparks. Stay tuned; this kid has talent.1991 October 7, “Critics' Voices: Movies”, in Time

   Synonyms:

   watch this space