Series whose the first letter is digit or other sign
- 1993 (2017–…)
- 1994 (2019–…)
- 1994 (2019–…)
- 2 Broke Girls (2011–2017)
- 20 to 1 (2005–…)
- 20,000 Leagues Under the Sea (1997)
- 20/20 (1978–…)
- 21 Jump Street (1987–1991)
- 227 (1985–1990)
- 24 (2001–2010)
- 24 Hours in A&E (2011–…)
- 24 Hrs to Hell and Back (2018–…)
- 24: India (2013–2016)
- 24: Legacy (2016–2017)
- 24: Live Another Day (2014)
- 28 Days Haunted (2022–…)
- 3 Below (2018–…)
- 3% (2016–…)
- 30 for 30 (2009–…)
- 30 for 30 Shorts (2012–…)
- 30 Rock (2006–2013)
- 32 Brinkburn Street (2011)
- 3rd Rock from the Sun (1996–2001)
- 4 Blocks (2017–…)
- 4400 (2021–…)
- 45 rpm (2019)
- 49 Days (2011)
- 50M2 (2021–…)
- 5ive Days to Midnight (2004)
- 61st Street (2022–…)