“A Great Cause” is a perfect example of no matter how much things seem to change, they remain the same. Unfortunately, Fiona (Emily Rossum) learns that the hard way, as does Monica (Chloe Webb) and Sheila (Joan Cusack). We discover the surprising, but ugly truth about Mandy’s (Emma Greenwell) pregnancy, and Steve (Justin Chatwin) tries desperately to bring Estefania’s (Stephanie Fantauzzi) lover, Marco (Thierre DiCastro), to the United States.