Series with the first letter - "T"
- That's My Boy (1981–1986)
- The 100 (2014–…)
- The 10th Kingdom (2000)
- The 1619 Project (2023–…)
- The 1980s: The Deadliest Decade (2016–2017)
- The 43 (2019–…)
- The 4400 (2004–2007)
- The 7 Lives of Lea (2022–…)
- The 93 Victims of Samuel Little (2020)
- The A Word (2016–…)
- The A-Team (1983–1987)
- The ABC Murders (2018–…)
- The ABC Saturday Superstar Movie (1972–1974)
- The Accident (2019)
- The Accidental Couple (That Fool) (2009–…)
- The Accidental Narco (2022–…)
- The Act (2019–…)
- The Addams Family (1964–1966)
- The Adventures of Brisco County, Jr. (1993–1994)
- The Adventures of Jimmy Neutron, Boy Genius (2002–2006)
- The Adventures of Paddington (2019–…)
- The Adventures of Paddington Bear (1997–2013)
- The Adventures of Pete & Pete (1992–1996)
- The Adventures of Sherlock Holmes (1984–1985)
- The Adventures of Swiss Family Robinson (1998–…)
- The Adventures of Tom Sawyer (1980–…)
- The Affair (2014–…)
- The Afterparty (2022–…)
- The Age of Influence (2023–…)
- The Alaska Triangle (2020–…)