V Season 3 Episode 13 The Rescue

Diana goes over Charles' head and orders a vicious attack on Los Angeles, putting it under Lizard control. An old friend of Julie's shows up at Resistance just after the attack. He needs help because his wife is pregnant and can't be moved. Julie helps them out, and they have to be rescued at the last minute before they are captured by Lt. James. Charles decides to marry Diana in order to make her go home. Lydia becomes quite jealous and puts cat poison in Diana's drink, but Charles drinks it and dies. Diana puts Lydia under arrest for killing Charles.