| ACCUMULATOR | Bet placed on a series of events |
| BAGATELLE | A legal bet placed on a mere trifle (9) |
| UNICORN | Mythical beast depicted on a series of seven tapestries with millefleurs backgrounds; or, a term for a $1billion tech start-up, so-named because of its rarity (7) |
| ODDSON | Type of bet placed on strange boy (4-2) |
| QUINELLA | Bet placed on first two in a horse race (8) |
| BEAST | A bet's placed on some irrational animal (5) |
| MORSE | Colin Dexter's inspector character; or, a form of code based on a series of dots and dashes (5) |
| ANTE | Entry bet placed on the poker table (4) |
| CHAIN | Measure of 100 links; a figure in a quadrille; a series of events; or, a linear sequence of bonded atoms (5) |
| CHAPTER | From "caput", meaning "head", a titled division of a book or other written work; a distinctive period in history or in a person's life; or, a series of events forming an episode (7) |
| OLD | Australian animated TV series based on a series of books by Leigh Hobbs (--- Tom) (3) |
| HEADMASTER | The Demon -; CBBC series based on a series of books by Gillian Cross (10) |
| EVERYTHING | The Theory of ___ book by Stephen Hawking based on a series of lectures given at Cambridge University |
| REBUS | ITV detective series based on a series of novels by Ian Rankin |
| DEXTER | American TV drama series loosely based on a series of novels by Jeff Lindsay |
| OFFCAMPUS | New Amazon show based on a series of Elle Kennedy books about sexy hockey players (yay!), although none of them are gay (boo!) |
| HANNIBAL | NBC show based on a series of Thomas Harris books |
| SHERLOCK | BBC show based on a series of Arthur Conan Doyle books |
| JUSTIFIED | FX show based on a series of Elmore Leonard books |
| STRATA | New start on a series of layers |
