Kevin was happy to perform at a kids party in a Riverton rat costume, but when Matt hears Lucy is visiting Simon, prods him along to spy and soon finds Eric is doing the same, alas equally clumsily. Rose knew Lucy came for Sandy, so Martin's secret gets spread. Meredith gets Ruthie to find out if Martin disconnects his cellphone because he has another, while he is considering his options whether to play baseball full time in his senior year semester as he already has enough credited courses.