To Catch the Uncatchable (棟篤神探) is a 25-episode TV drama series produced by TVB of Hong Kong, which stars Dayo Wong as the genius (albeit physically weak and with asthma) CID Mok Tsok Tung (莫作棟) and Ada Choi as Vivi Lee Wai Wai (李慧慧), an insurance agent, with Marco Ngai and Michael Tong as major background characters.

The drama is centered around the exploits of Detective Mok (Wong) unmasking murderer that seemingly related somehow to either his "rival" Vivi (Choi).

However, besides Mok, Vivi has a few thorns of her own: the despicable rival agent and lady-killer Romeo Lo Mat-au (羅密歐, derisively called 蘿蔔歐 lo bak au, which is a derogatory term for Japanese people) by Vivi (played by Marco Ngai), and a clueless smitten admirer in her personal trainer Jim (played by Michael Tong).

The latter opinion won out after they flooded newspapers, internet forums and newsgroups, and TVB claims that it is an original unedited ending, in which Mok still falls down but managed to get back to the photo shoot, albeit pensively.

The alternate ending was shown on 27 August 2004 in local entertainment programme TVB Starbiz (娛樂大搜查), and was not included in any subsequent releases overseas.

A clever yet frail CID of the Hong Kong police force, he uses unorthodox methods and picks up on the strangest of clues that somehow ends up a) involving Vivi in the case and b) busting the correct criminal, sometimes ahead of his boss, the befuddled Inspector- Sze Ko But, whose name rhymes with "stupid".

Vivi's rival project manager at the Universal Insurance Company; a cunning and conniving man who charms his way into someone's good books before stabbing them into the back to claim the riches for himself.