Molly McGrath is Josh's mother died when he was just a toddler, in a shipwreck during a storm at sea while the family was on a pleasure trip. Molly makes a brief appearance without dialogue only once when the incident is mentioned in the episode "Sharks": Max is being haunted by her death, and, despite being only a toddler when she died, blames himself for her death. After this, she's never mentioned again. Besides being a lovely mother, there's no other information about her.