Lt. Cmdr. Harmon 'Harm' Rabb, Jr.:  I keep forgetting I do n't know you .
Maj. Sarah 'Mac' MacKenzie: Deja vu again ?
Lt. Cmdr. Harmon 'Harm' Rabb, Jr.: Only whenever I see your face , or I hear you talk . I would n't know about your smile ; I haven't seen _ one _ yet .
Maj. Sarah 'Mac' MacKenzie: There 's not much to smile about .
Lt. Cmdr. Harmon 'Harm' Rabb, Jr.: I guess not .
Maj. Sarah 'Mac' MacKenzie: Sounds like I have a twin out there .
Lt. Cmdr. Harmon 'Harm' Rabb, Jr.: Not anymore .