Consisting of many episodes that are grouped together in seasons or series, a long-form television show that intends to tell a continuous, long story can be cancelled for any reason before it broadcasts all of its planned episodes and resolves all story arcs and its central premise. This can happen as the series is getting started, or even before a single episode has been broadcast. In most cases, to get a series broadcast, its creators must typically produce a pilot episode to convince a television network to pick up and support it. There is no guarantee that the pilot will air, the network holds the final say on whether the series will go forward. There is also a chance that the network can cancel the series just after it airs roughly half of its first season and issue a mid-season replacement that would air instead of the second half of episodes. If a series fails to start, it would technically be unfinished in the sense that substantial effort was put into developing it and much more work could have been done on it had it actually been able to begin.