List of causes of Ondine's curse. Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Ondine's curse) that could possibly cause Ondine's curse includes: Persons who have CCHS get it at birth, or develop it due to severe neurological trauma/damage to the brainstem.
In real life, Della (Barbara Hale) was married and Perry (Raymond Burr) was gay. So, no, they were not an item on the show or behind the scenes.
About Rev. Della (excerpted from biography.com) Synopsis. Born in Michigan in 1931, Della Reese began making records and performing on television variety shows in the 1950s. From 1969 to 1970, she hosted a TV talk show called Della, and she went on to appear in many other series over the decades, including Sanford and Son and Picket Fences.