HBO On Demand is a a service offered exclusively to HBO subscribers, enabling them to watch previously-aired programs. But it is only available in some areas, and only with some cable and satellite TV providers. The options available for getting rid of an HBO On Demand movie from the "In Progress" menu on your cable box varies depending on the cable provider and the device's model type.
Access the "In Progress" list from the cable box's On Demand menu. Select the HBO On Demand movie you would like to delete from the list. An options menu should open. Look for an option to "Delete" or "Cancel" the movie. If the option is available, highlight and select it.
Access the "In Progress" list from the cable box's On Demand menu when you are ready to stop watching TV. Select the HBO On Demand movie you would like to remove from the list. Press the appropriate key on the remote to resume playback of the movie. Leave the cable box on to allow the movie to play all the way through, but turn off the TV. The program will disappear from your "In Progress" list once it has played all the way through.
Disconnect the cable box's power cord, and leave it unplugged for one to two minutes. Plug the power cord back into an electrical outlet. This will reset the cable box. Access the "In Progress" list from the cable box's On Demand menu. Sometimes resetting the cable box will erase all of the shows listed in the "In Progress" list.