In David Gemmell's Troy trilogy, Cassandra is credited with opening the mind of exiled Egyptian prince Gershom (Moses) to his own gift of prophecy. Cassandra got her gift after suffering from 'brain-fever' as a young child, and dies in the volcanic eruption of Thera.

In the section Cassandra of Suggestions for Thought to Searchers after Religious Truth, Florence Nightingale protests the over-feminization of women into near helplessness, such as what Nightingale saw in her mother's and older sister's lethargic lifestyle despite their education. The work also reflects her fear of her ideas being ineffective, as were Cassandra's.

In Hector Berlioz’s opera Les Troyens (1863), based on Virgil's The Aeneid, Cassandra commits suicide with other Trojan women as Troy falls, rather than being raped by Ajax. She dies with the word “Italy” on her lips, presaging (in prophetess mode) her cousinAeneas’s eventual founding of Rome. This is a role written for a dramatic mezzosoprano, whose most important interpreters in the last years were singers like Petra Lang, Jessye Norman and Anna Caterina Antonacci.

In the 2001-2011 television series Smallville, the Season 1 episode "Hourglass" features a character named "Cassandra Carver" (played by Jackie Burroughs),an elderly woman who can see the future.

In the 1997-2003 television series Buffy the Vampire Slayer, the seventh season episode "Help" features a character named "Cassie Newton" (played by Azura Skye), a teenage girl who can see the future, such as her own death, her best friend's history test results, the protagonist Buffy Summers' future battle with The First in "Chosen," etc.^{[citation needed]}

In The Secret Series by Pseudonymous Bosch, the narrator gives each character a fake name to hide their identity (for the characters' protection). The name he gives the main protagonist is "Cassandra", or "Cass" for short, naming her after Cassandra of the myth, as Cass is always predicting dangerous events.

Showtime television series Homeland uses the same myth with Claire Danes as the Cassandra figure and Damian Lewis as the Apollo figure.^{[citation needed]}

An episode of BBC science fiction sit-com Red Dwarf called 'Cassandra' depicts the ship's crew dealing with a computer called 'Cassandra' who can predict the future with "an accuracy rating of 100%."

Cassandra appears as a main character in Disney's Hercules voiced by Sandra Bernhard. She appears as a friend of Hercules andIcarus. Like in mythology, she could foresee the future and was generally unbelieved until the event happens. This has caused her to be pessimistic to humorous levels.

In J.K. Rowling's Harry Potter series, the Divination professor is said to be the great-great-granddaughter of "the celebrated Seer Cassandra Trelawney." (See: Harry Potter and the Order of the Phoenix, chapter 15)

In Theresa Tomlinson's novel "The Moon Rider," Cassandra becomes a Moon Rider and is presented as Trojan princess promised to Apollo.

The musical group 'ABBA' has a song named "Cassandra" including the lyrics "But none of us would listen to words of warning", and "Sorry Cassandra, I didn't believe you really had the power; I only saw it as dreams you would weave, until the final hour."

Norwegian gothic metal band, Theatre of Tragedy wrote a song titled "Cassandra" on their 1998 album, Aégis. Each song on the album dealt with a famous female figure in folklore or mythology.

The artist Emmy the Great has a song called "Cassandra" on her second album, "Virtue". The song refers to Cassandra's prophetic power and inability to change the future: "And daily, you saw it come, And you gave warning but couldn't run, And so you watched until it was broken, And knew that foresight delays no motion."

In the 1997 horror film, Scream 2, the main character of Sidney Prescott plays the title role of Cassandra in her college's play about the myth. She is shown rehearsing a scene from after the fall of Troy.

In Sheri S. Tepper's post-apocalyptic novel The Gate to Women's Country, the women put on a performance of a play entitled "Iphigenia at Ilium", which tells the story of the Siege of Troy from the point of view of the women in the story, including Cassandra. Cassandra appears as a ghost in the play.

In the film 12 Monkeys, Cassandra is referenced by a protagonist who has difficulty believing a time-traveler from the future.

In the Dresden Files series, the protagonist meets a character afflicted with Cassandra's Tears, well known in-universe among the supernatural community. The victim is seized with visions of the future, which always come to pass but are never believed by others. The condition itself might be considered a Cassandra affliction, in addition to the visions - there is no physical or psychic evidence of it on a person, so others often don't believe that they have it.

In the 1995 film, Mighty Aphrodite, one of the Greek Chorus is Cassandra.

Modern usage[edit]

In more modern literature, Cassandra has often served as a model for tragedy and romance, and has given rise to the archetypal character of someone whose prophetic insight is obscured by insanity, turning their revelations into riddles or disjointed statements that are not fully comprehended until after the fact.

In his 2011 novel The Diviner's Tale,^[9] Bradford Morrow names the protagonist Cassandra. She is a Diviner, also called a water-witch or dowser, who finds spots for wells and ponds in the back country, for farmers and developers. Cassandra foretells a murder that seems unlikely at first, and then impossible, but finally proves to be prophetic and leads to the discovery of a serial murderer.

A manga called "Uncassandra" by Hifumishi Gorou refers to Cassandra's prophetic ability and stars two people who have the ability to predict disasters, but who decide to sabotage their own prophecies and prevent the disasters they've seen from occurring.

Greek and Latin sources