Thomas went to medical school with Leslie Thompkins, Matt Thorne, and Anne Luitina. Thomas, Leslie, and Matt were known as "The Three Musketeers" at school, and were considered inseparable. They spent their graduation week at the Waldorf, and pictures were taken at a big AMA mixer. They signed one another's yearbook, "The Caduceus", and remained in touch for several years.
Thomas was a loving husband and father, and would often playfully toss his son in the air. He would always watch the television show "The Gray Ghost" with his son. He referred to Bruce as "stubborn" from the day Bruce was born. He once told his son, "Those who have the most, must give the most".
Thomas Wayne with his wife, Martha Wayne, was killed by a mugger in front of his eight-year-old son in the so-called "Park Row Tragedy".
The Waynes' murder would be the single most important event that drove Bruce Wayne to become Batman. Thomas was buried alongside his wife, Martha.
Thomas's son, Bruce, often had nightmares involving his parent's death and this helped continue his crusade as Batman. Bruce would have many photographs and portraits around Wayne Manor and the Batcave of his parents.
Every year on the anniversary of his parents' death, Batman would put two roses in Crime Alley at the site of their death. He would occasionally place two roses at their gravestone as well.
The Thomas Wayne Memorial Free Clinic in Park Row was named for Thomas. After Matthew Thorne surrendered himself to the Gotham Police Department on charges on aiding criminals and practicing medicine without a license, Bruce Wayne met him to offer moral support, and asked Thorne to tell him about his father, wherepon the two men had a friendly conversation over coffee about Thomas' younger years.
Dreams and Memories
When first infected with the Scarecrow's fear toxin, Batman saw visions of his father being mad at Bruce disgracing his father's name.
When Bruce was recovering from memory loss, one of his first memories was of his father.
After Harvey Dent's transformation into Two-Face, Bruce connected Harvey's disfigurement with his parents' deaths in his dreams.
When under control of the Mad Hatter's mind control apparatus, Batman saw a world where his parents had never been killed. In this "Wonderland", Thomas Wayne had retired from Wayne Enterprises, and gave the company to Bruce, who never became Batman. Thomas lived with his wife and son at Wayne Manor, and would often spend his days at the golf course. He was worried about his son's odd demeanor and when Bruce left home, Thomas and Martha contacted the police to bring him back.
Dr. Hugo Strange saw images of Thomas Wayne within Bruce's mind while using his radiopathic monitoring device.
While under the influence of the Black Mercy, Bruce relived the night his parents were attacked in Crime Alley, this time Thomas fought off their attacker, until Bruce was freed from the Black Mercy and the dream returned to the familiar nightmare.
↑The year "1908" is featured prominently in Leslie's yearbook under, although its significance is unknown. As the Batman: The Animated Series episodes take place in the 1990s, it seems unlikely as a birth date and impossible as a graduation date.