The official lyric video of "Sino Ka Ba?," the theme song of The Iron Heart," is now available on ABS-CBN Star Music's official YouTube channel.
Recorded by Idol Philippines Season 2 champion Khimo Gumatay, "Sino Ka Ba?" was composed by Rox Santos, Jeremy G and Jonathan Manalo.
Watch the story of Apollo Adelantar (Richard Gutierrez) unfold in The Iron Heart, weeknights, on Kapamilya Channel, Kapamilya Online Live, and A2Z.