In a rare instance, Samantha calls Gladys Kravitz by her first name instead of Mrs. Kravitz.
Character actress Maudie Prickett (Woman on the Street) would appear five times on the series, three as Tabitha's teacher. One of her most notable film appearances was in the uncredited part of Elsie, a maid, in Alfred Hitchcock's North by Northwest (1959).
The title refers to the cliched doctor's advice, "Take two aspirin and call me in the morning."
The roses commonly called black roses are technically a very dark shade of red, purple or maroon. The color of a rose may be deepened by placing a dark rose in a vase of water mixed with black ink. Its symbolism, in many works of art or fiction, is usually to contrive feelings of mystery, danger, death, or some sort of darker emotion like sorrow or obsessive love.