Thaddeus James "Tad" Gardner is written into "All My Children" in the summer of 1973. Tad (then Matthew Anton), whose birthdate is noted as September 1, 1963, is beaten and abandoned (off-screen) by his biological father Ray Gardner (Gil Rogers). Tad is found in a Pine Valley park by Dr. Jeff Martin (Charles Frank) and his fiancée, nurse Mary Kennicott (Susan Blanchard), who become Tad's foster parents. When Mary is killed during a home invasion, Jeff asks his parents, Dr. Joe (Ray MacDonnell) and nurse Ruth Martin (Mary Fickett), and grandmother, Kate Martin (Kay Campbell), to care for Tad. Ray returns and tries to sell Tad to the Martins for $15,000. Angered at their refusal to pay, Ray rapes Ruth. When Ray is sent to prison for the crime, Tad is formally adopted by the Martins. He develops a close relationship with his adoptive grandmother. But despite this, Tad (then John E. Dunn) proves to be a rebellious teenager. In 1981, he steals the Martins' car, and runs away from home for two years.