Philippine TV History:

Philippines:
Most Watched Episodes
(by ratings) (source: AGB Nielsen Philippines)
Rosalinda (78.5%) (Episode 35)(1999, ABS-CBN)
Meteor Garden (68%) (Episode 5) (2003, ABS-CBN)
Esperanza (67%) (Episode 108) (1997, ABS-CBN)
Pangako Sa'yo (65.5%) (Episode 250) (2001, ABS-CBN)
Basta't Kasama Kita (63%) (Episode 36) (2003, ABS-CBN)
Sana'y wala ng Wakas (62.7%) (Episode 27) (2004, ABS-CBN)
Mula sa Puso (61.1%) ((Bus Explotion episode) (1996, ABS-CBN)
Marimar (61%) (Episode 29) (1994, RPN9)
Pinoy Big Brother (57.9%) (2nd to the final episode) (2005, ABS-CBN)
I-witness (57.8%) (Episode "Dukha") (1999, GMA)
Bituin (57.5%) (Episode 10) (2003, ABS-CBN)

40 Highest rated TV shows
The Battle: Pacquiao vs. Morales (2006, ABS-CBN)(83.5%)
Rosalinda (1999, ABS-CBN) (69.8%)
Meteor Garden (2003, ABS-CBN) (63.8%)
Esperanza (1997, ABS-CBN) (63.5%)
Ms. Universe (1994, ABS-CBN) (62.5%)
Pangako Sa'yo (2002, ABS-CBN)(62.1%)
Marimar (1994, RPN9) (61.7%)
Maria Mercedes (1996, ABS-CBN) (59.7%)
Ms. Universe (1999, RPN9) (58.4%)
Bubble Gang (1997, GMA) (57.6%)
Maalala mo kaya (1991, ABS-CBN) (57.3%)
Balitang K (1998, ABS-CBN) (56.6%)
Wansapanatym (1997, ABS-CBN) (56.4%)
TV Patrol (1996, ABS-CBN) (56%)
I-Witness (1999, GMA) (55.3%)
Magandang Gabi...Bayan (2000, ABS-CBN) (55%)
Darna (2005, GMA) (54.3%)
Mula sa Puso (1994, ABS-CBN) (53.7%)
Pacquiao vs. Barrera (2004, RPN9) (52.9%)
2005 SEA Games (2005, ABC-5) (52.6%)
Basta't Kasama kita (2003, ABS-CBN) (52.5%)
Star Circle Quest (2004, ABS-CBN) (52.3%)
F.l.a.m.e.s (1996, ABS-CBN) (51.9%)
Encantadia (2005, GMA) (51.7%)
Marina (2004, ABS-CBN)(50.8%)
Pinoy Big Brother (2005, ABS-CBN) (50.4%)
Mojacko (1998, GMA) (49%)
Star Circle Quest (2004, ABS-CBN) (48.2%)
Mulawin (2004, GMA) (47.3%)
Bituin (2003, ABS-CBN) (47.2%)
Saan ka man naroroon (1999,ABS-CBN) (46.8%)
Starstruck (Season 3) (2005, GMA) (46.4%)
Lovers in Paris (2004, ABS-CBN) (45.7%)
Papal Visit 1995 (1995, GMA) (45.3%)
Mara Clara (1994, ABS-CBN) (45.1%)
Princess Sarah (1995, ABS-CBN) (44.3%)
Sugo (2005, GMA) (43.2%)
Sa Puso ko, Iiangatan ka (2003, ABS-CBN) (42.7%)
Full House (Korean Drama) (2004, GMA) (42.3%)
Stairway to heaven (2004, GMA) (41.5%)
(source: AGB Nielsen Philippines)

Most Watched Finales
Rosalinda (69%) (1999, ABS-CBN)
Meteor Garden (65.3%) (2003, ABS-CBN)
Darna (62.7%) (2005, GMA)
Encantadia (60.4%) (2005, GMA)
Pinoy Big Brother (60.3%) (2005, ABS-CBN)
Esperanza (59.8%) (1997, ABS-CBN)
Basta't kasama kita (58.6%) (2003, ABS-CBN)

source: http://www.search.com/reference/List_of_most-watched_television_episodes