| Native Name: | 爭分奪秒 |
| Genre: | Crime thriller Action |
| Starring: | Alex Fong Kevin Cheng Patrick Tam Marco Ngai Yoyo Mung Moses Chan Sririta Jensen Chatchai Plengpanich |
| Country: | Hong Kong |
| Language: | Cantonese |
| Num Episodes: | 30 |
| Producer: | Marco Law |
| Location: | Hong Kong Thailand |
| Camera: | Multi camera |
| Company: | TVB TV3 |
| Channel: | TVB Jade |
Split Second is a 2004 Hong Kong crime thriller television drama produced by TVB and Thailand's TV3, with Marco Law serving as the executive producer. It ran from October 4, 2004 to November 12, 2004, with the total of 30 episodes.
This show uses a format similar to the American series 24. Each one-hour episode represents one day in the show's timeline, and an on-screen digital clock appears in the show regularly to remind viewers the time in the storyline.
This story is about the 30-day game of chasing between the Hong Kong police and the Hong Kong Triads, who are allegedly linked to the Thai mafia. The story starts on April 1, 2004 with an attack on the police commissioner, and ends on April 30, 2004, with the deaths of many good people.