Marc Anthony had a "wasted youth" as they say but apparently was a serious soldier. In this series you can't understand why anybody would follow him. He also had three children by Cleopatra who were raised by his Roman wife, Octavia, after he and Cleopatra killed themselves. The Cassius of this series is too effete and the dynamics between Brutus and Caesar are all muddled. The argument between them before Brutus joined the assassins was just plain dopey.
I didn't like the characters, as portrayed, of Brutus, Cassius, or Cicero.