Through an oversight, Worldvision didn't renew the copyrights on most episodes of this series when they expired in the late 1980s, and they thus fell into the public domain. Since royalties didn't have to be paid to Worldvision, the result was a revival of the series on UHF and cable television and on VHS and DVD. Since well-worn syndication prints were and are typically used by those media, the results often leave something to be desired, quality-wise. Despite the public domain status for most episodes, the series' remaining copyrights belongs to its distributor CBS Television Distribution. CTD is the successor to the series' previous distributors, which include ABC Films successor Worldvision Enterprises and CTD's predecessor Paramount Domestic Television.
