S5·E10 The Messenger

Richie's found a new teacher: an Immortal who preaches a message of peace. An Immortal who believes that all Immortals can lay down their swords and live together as brothers. An Immortal who claims to be the oldest of their kind still alive -- Methos. Will laying down his sword in the name of peace mean Richie will lose his head? And what does this mean for the friend MacLeod already calls Methos?