a mouse and our dear kitty wormwood

so my brother and sister in law have a cat named wormwood (i wanted to name him sara jessica parker but that didnt fly by my brother in law) anyways, in recent months my brother and sister in law have developed a mouse or i should say mice problem (mice being plural?) and it turns out wormwood isnt fufilling his cat duties... he mostly likes to look at them, they are cute but we prefer them outside. here are some pics to prove wormwood SHOULD in fact be named sjp because he is no man cat.