taking off for their weekend passes. >> the men are all trusted to come back on their own. according to the prison it's only rarely that one doesn't come back. but of all the surprises our crew discovered at zabela, it was their second encounter with seventh block inmate vladimir pejdo that proved the most surprising of all. he was on his way to a conjugal visit with his wife, alexandra. >> translator: it's a private visit between me and her and nobody else. we can spend three hours together. >> just a few of the american prisons profiled on "lockup" allow conjugal visits. usually overnight stays between well-behaved inmates and their spouses. what made this visit so unusual, however, was that alexandra is not only vladimir's wife but his partner in crime. she is currently incarcerated at a serbian women's prison and was transported to zabela for the visit. >> it's a nice privilege for somebody locked up.