| Alt Name: | When You Were Mine |
| Genre: | Romantic drama |
| Director: | Joel Lamangan |
| Starring: | |
| Theme Music Composer: | Tata Betita |
| Open Theme: | "Una Kang Naging Akin" by Ram Chaves |
| Country: | Philippines |
| Language: | Tagalog |
| Num Episodes: | 80 |
| Executive Producer: | Camille Gomba-Montaño |
| Camera: | Multiple-camera setup |
| Runtime: | 25–35 minutes |
| Company: | GMA Entertainment TV |
| Network: | GMA Network |
(International title: When You Were Mine /) is a 2008 Philippine television drama romance series broadcast by GMA Network. Based on a 1991 Philippine film of the same title, the series is the tenth instalment of Sine Novela. Directed by Joel Lamangan, it stars Angelika Dela Cruz, Wendell Ramos, and Maxene Magalona. It premiered on September 1, 2008, on the network's Dramarama sa Hapon line up replacing Magdusa Ka. The series concluded on December 19, 2008, with a total of 80 episodes.
Tragedy strikes when the helicopter that Nick crashes on a remote island. A body is found in the crash site but it turned out to be Nick's officemate whose name was not listed in the passenger manifesto. The "death" of Nick caused great grief to Vanessa since she was already betrothed to be married to the young man. On the remote island, Nick meets Modesto Mallari, a marine biologist. Because of his memory loss, Nick introduces himself as Darwin. Mallari takes Darwin to his home where he introduces his daughter, Jessa. As time passes by, the two develop feelings for each other and have a child together. Darwin becomes involved in another accident that triggers the return of his past memories. With the return of his memory, Darwin's identity, as well as Jessa and their child, no longer exist in Nick's recollection.[1]
According to AGB Nielsen Philippines' Mega Manila household television ratings, the pilot episode of earned a 21.5% rating.[2] While the final episode scored a 24.9% rating.[3]