Maggie refers to Adam as just a kid, which is fine in the series, because there is almost four years between them, with Maggie being older, but the actor who plays Cooper, Damien Walshe-Howling, was born on Friday the 22nd of January, 1971, whereas the actress who portrays Maggie, Lisa McCune, was born on Friday the 19th of February, 1971, four weeks later. Interestingly, another site gives Lisa McCune's place of birth as Sydney, but this site says she was born in Perth.