After Henry pegs the case of a would-be bridge jumper as a homicide while the police label it a suicide, he and Jo go on a rogue investigation for proof. Meanwhile, Henry's anonymous caller surfaces again. Apparently, he has been tracking him for years. A letter on antique stationery might provide Henry a fascinating clue about the caller, and he enlists Abe's help in tracing the note's history to a foreign locale. Revealing flashbacks unveil the beginning of Henry's great love affair with his soon-to-be wife, Abigail.

Henry is interested in aging and how to die, but New York's wealthy elderly are chasing a way to turn back the clock. A clinic is dispensing a pricey product - Aterna - which is supposed to provide the much sought after fountain of youth. But instead, Henry and Jo are confronted with multiple deaths from the costly potion, which instead of revolutionizing the aging process, is turning people's brains into swiss cheese. Meanwhile Henry remembers back to dear friend who was diagnosed with tuberculosis in 1906 and discovers a link to this current case. Unbeknownst to ...

The death of Gloria Carlyle, the elegant, seemingly ruthless matriarch of one of New York's wealthiest and oldest families, brings a world of hurt down on her family. After Gloria is found dead at a Metropolitan Museum of Art gala celebration of her philanthropy, Henry runs through a variety of suspects and motives but is pulled from the case when the family demands faster answers. Abe assists Henry and Jo entering the family's estate sale for important clues through his antique connections. Meanwhile, Henry is tormented by the haunting and melancholy memories that ...

What looks like a drug overdose death of a reformed junkie-turned community activist results in Henry and Jo tracking a murderer. The complex investigation involves dirty dealings between a real estate developer and a community organizer with millions of dollars at stake. Henry flashes back to the same 1890s New York tenement where he worked as a doctor to help the poor, including an orphan boy who gives him a special handmade gift. Meanwhile, Abe cooks up a Sunday dinner feast for Henry, Jo and himself. When Jo tries to find out how the two men know one another, ...

When a human heart is delivered fresh out of a body to the homicide division, Henry and Jo end up in the middle of a Jack the Ripper copycat murder investigation. But it doesn't stop there. A second killing resembles another infamous, unsolved crime: the Black Dahlia murder. Henry has seen it all before, as flashbacks show his involvement with the two original cases from two very different periods of his long life. However, Henry's anonymous caller tips him to search beyond the clues of these classic killings and leads the police squad to profile a very different, yet... He's a 200 year-old detective. You have to know there'd be a Jack the Ripper episode.

Dr. Tyler Forester, founder of a free medical clinic and the son of a Wall Street billionaire, is awarded one of the city's highest honors for his humanitarian efforts. A few hours later, he is found dead in his tiny apartment. Henry and Jo discover that Tyler's life of privilege and those of his thick-as-thieves Hamilton School classmates took a fateful turn one night many years ago. Now, the nightmare they thought they buried deep within themselves has come back to haunt them. Meanwhile, Henry recalls being faced with the terrible dilemma of being forced to decide ...

Henry and Jo become immersed in the world of a dominatrix, who doesn't dole out pain for kinky pleasures but for therapeutic purposes. Meanwhile, Abe reacquaints himself with his own form of pain and pleasure - his former wife.

A man dies when his car catches fires and incinerates him. The various suspects center around the world of jazz and concerns the true author of one of its greatest standards.

When all the ingredients for a sensational, scandalous murder investigation are combined -- a fairytale romance gone wrong, a jealous mentor and lover, an anxious, wealthy father of the beautiful fiancée - does love really conquer all? An engaged British aristocrat turns up dead in Central Park, and his identity is called into question, as well as who killed him. The trail leads Henry and Jo through one of New York's top luxury department stores and from working class to upper crust New York society. Henry remembers back to 1957 when, once again, he and his family had...