In the Android TV client live guide, when you move the focus to a program in the guide, it displays a summary of the program above the grid.
Some programs do not start on the hour or half-hour, so it would be nice if the summary displayed the start time and end time (or duration) for the program.
If you select (click) on an upcoming program, you get the "record dialog" that shows the information, but that seems like a workaround. It would be much more convenient if the information was displayed in the summary above the grid.
Another option that some guides use is to display the times under the show title in the grid itself.