On March 17, 2014, "Baby Daddy" was renewed for the fourth season. It premiered on October 22, 2014, with the series' first Halloween episode "Strip or Treat". The second Christmas episode of the series entitled "It's a Wonderful Emma" premiered on December 10, 2014. Aisha Dee guest starred as Olivia, Tucker's ex-wife. Christa B. Allen will appear in a recurring role as Robyn, a corporate lawyer working at Riley's law firm, who later begins dating Danny. Eddie Cibrian will appear in a multi-episode arc as Ross, a guy that Riley falls for, later discovering that he is her boss. Jackée Harry will guest star as Judge Johnson, a no nonsense judge, with a weakness for children. The episode will reunite Harry with Tahj Mowry, Mowry made numerous guest appearances on Harry's 1990s sitcom "Sister, Sister".