In the tradition of Highway To Heaven the Creator/Deity has a trio of angels sent down to earth to give a little comfort and cheer to folks down on their luck. I guess with the death of Michael Landon somebody decided to take up the slack and create a show along the same lines which ran for 8 years.
Using phrases like young and old seem meaningless when you're talking about eternity, but in relative terms old and wise angel Della Reese serves as friend and mentor to Roma Downey a fairly new angel on the job. When someone is about to enter eternity John Dye who is an angel of death is called in as well.
The stories ran just about like Highway To Heaven stories did. A possibly more liberal bent to them. I recall one episode where the angels comfort a man afflicted with AIDS. A disease purportedly restricted to gays and drug addicts. You'd have never seen that on the Landon show.
Of course Della Reese sang in several episodes. Those were a special treat. It's doing well in circulation and may it continue to do so.