I think it is the May 18 episode, and this show runs at 9:20 PM and it's now 9:57PM in the Philippines, so ... the mud wrestling scene is probably airing live as I type this. So probably check for it online within the next few hours? I'm finding a couple of dodgy-looking sites with low-res video of the "most recent" episode, but I think it's yesterday's.
Promising as the *idea* of a crazed mud wrestler taking people hostage in her mudpit at gunpoint sounds on paper (Wamfan? Kym? Are you taking notes?) ......... I must say the execution here sadly proves somewhat lacking.