Jeopardy is the long-running American quiz show created by Merv Griffin that first premiered in 1964 and later became a syndicated staple hosted for decades by Alex Trebek. Its timed format made short audio cues essential, because contestants have only seconds to respond in the form of a question. The three-beep time's up signal became one of its most recognisable cues and moved easily online, where short, unmistakable game show sounds are reused in edits, streams and classroom quizzes as an instant marker that time has run out.