| Native Name: | 致，第三者 |
| Genre: | Romance, Drama |
| Creator: | Eastern Television |
| Director: | 王傳宗 |
| Starring: | Amber An Melvin Sia Marcus Chang |
| Opentheme: | If We Meet Again 如果我們再相遇 by Wang Li Ren 王笠人 |
| Endtheme: | Don't Say You Never Loved 別說沒愛過 by William Wei |
| Country: | Taiwan |
| Language: | Mandarin |
| Num Episodes: | 15 |
| Producer: | 王珮華 |
| Location: | Taiwan |
| Runtime: | 70 minutes |
| Company: | Good Whale Studio 王珮華工作室 |
| Channel: | TTV EBC Variety |
To the Dearest Intruder is a 2015 Taiwanese television series created and produced by Eastern Television. It stars Amber An, Melvin Sia, and Marcus Chang. Filming began on April 18, 2015, and wrapped up on August 14, 2015. First original broadcast began on August 22, 2015, on TTV airing every Saturday night at 10:00-11:30 pm.
Sometimes best friends like all the same things. But what happens when one of those things is the same man? Song Jia An and Luo Shao Qing are best friends in college. They both are in love with Yan Hao, but Shao Qing learns that Jia An has been saying from childhood that she plans to marry Yan Hao. However, Yan Hao develops feelings for Shao Qing and may have chosen her over Jia An. But his life is suddenly thrust in a different direction when his father is shot to death over money issues, leaving Yan Hao to pay off his father's debt while also trying to establish his own company. Jia An stays by his side during this trying time, so Shao Qing feels she needs to be out of the picture. Ten years later, Yan Hao and Jia An are married and meet up with Shao Qing again at a school reunion. When Yan Hao sees Shao Qing again, he realizes that he is with the wrong woman. Can he make things right after 10 years or will the cruel hands of fate get in the way again?
王笠人
Competing dramas on rival channels airing at the same time slot were:
| Air Date | Episode | Average Ratings | Rank | |
|---|---|---|---|---|
| Aug 22, 2015 | 1 | 0.44 | 3 | |
| Aug 29, 2015 | 2 | 0.56 | 1 | |
| Sep 5, 2015 | 3 | -- | -- | |
| Sep 12, 2015 | 4 | -- | -- | |
| Sep 19, 2015 | 5 | 0.64 | 1 | |
| Sep 26, 2015 | 6 | -- | -- | |
| Oct 3, 2015 | 7 | -- | -- | |
| Oct 10, 2015 | 8 | 0.65 | 1 | |
| Oct 17, 2015 | 9 | 0.88 | 1 | |
| Oct 24, 2015 | 10 | 1.04 | 1 | |
| Oct 31, 2015 | 11 | 0.94 | 1 | |
| Nov 7, 2015 | 12 | 1.25 | 1 | |
| Nov 14, 2015 | 13 | 1.07 | 1 | |
| November 21, 2015: Airing of "52nd Golden Horse Awards" | ||||
| Nov 28, 2015 | 14 | 1.06 | 1 | |
| Dec 5, 2015 | 15 | 1.48 | 1 | |
| Average ratings | 0.91 | |||