Sherlock Jr. is an upcoming 2018 Philippine television drama series to be broadcast by GMA Network. Starring Ruru Madrid in the title role, the series is set to premiere on January 29, 2018 replacing Super Ma'am on the network's Telebabad line up. Cast and characters[edit]. Lead cast. Ruru Madrid as Sherlock "Jack" Jackson Jr. Gabbi Garcia as Lily Pelaez; Serena the dog as Siri; Mikee Quintos as Siri's voice.