Iisa Pa Lamang is a 2008 Philippine melodrama romantic suspense television series directed by Ruel S. Bayani and Manny Q. Palo. The series stars an ensemble cast consisting of Claudine Barretto, Angelica Panganiban, Diether Ocampo, Gabby Concepcion, Cherry Pie Picache, Susan Roces, Laurice Guillen, Joel Torre, Melissa Ricks, and Matt Evans. The series premiered on ABS-CBN's Primetime Bida nighttime block replacing Lobo on its timeslot and was replaced by Pinoy Fear Factor from July 14 to November 7, 2008.

Claudine Margaret Castelo Barretto is a Filipino actress. Known for her acting versatility, she is considered one of the most prolific actors in Philippine entertainment. She has received numerous accolades, including two FAMAS Awards and a Star Award.