Kenpuu Denki Berserk - episode 21 - 03 Mar, 1998

Guts helps the Hawks drive off the mercenaries. Casca has a plan to rescue Griffith from the Tower of Rebirth where he is being held. Casca blames Guts for Griffith's problems, but realizes it is not his fault. They make love and Guts asks her to go away with him after the rescue. (Source: Wikipedia)