On board Deep Space Nine , Captain Benjamin Sisko ( Avery Brooks ) is being queried by Department of Temporal Investigations agents Dulmer ( Jack Blessing ) and Lucsly ( James W. Jansen ) . The Captain explain that he was on the USS Defiant , returning from Cardassian space with the Bajoran Orb of Time . They had picked up a hitchhiker on the way , a human called Barry Waddle . Suddenly the ship found itself some 200 light years away from its previous location and a hundred years in the past , near Deep Space Station K7 and found the USS Enterprise in orbit . They discover that the hitch @-@ hiker was Arne Darvin ( Charlie Brill ) , a Klingon agent who had previously been caught by Captain James T. Kirk ( William Shatner ) on K7 whilst trying to poison a shipment of grain .