the deal due to new educational programming regulations put into effect by the FCC that The Tube not immediately comply with by inserting E/I-compliant programming within its schedule, effectively putting the burden on local stations to carry programs that complied with the regulations; the network ceased operations on October 1, 2007, due to several factors likely including the discontinuance of the Sinclair carriage deal. In August 2010, Sinclair signed a groupwide affiliation deal with The Country Network (later known as ZUUS Country during the final year of its carriage on WTTO/WDBB), a digital subchannel network featuring country music videos, to the 28 of the company's stations. WTTO/WDBB relaunched its second subchannel as an affiliate of The Country Network on October 26, 2010; the subchannel disaffiliated from ZUUS Country on July 1, 2014, when it began carrying the classic movie network GetTV, as a result of a channel lease agreement with Sinclair that involved 33 of the company's stations. As a result of WDBB becoming a simulcaster of WBMA-LD on its second subchannel in October 2014, WTTO and WDBB only simulcast the former's main programming feed, choosing to reallocate bandwidth space on WDBB's signal to transmit WBMA's programming feed in high definition on digital channel 17.2. On January 4, 2016, as part of a groupwide affiliation agreement with the network spurred by the network's acquisition of rights to reruns of The Tonight Show Starring Johnny Carson, WTTO switched the affiliation of its second digital subchannel to Antenna TV; this resulted in the displacement of GetTV (Now TBD) to a newly created fourth digital subchannel of the station. WTTO-DT3 On October 31, 2015, WTTO launched a tertiary digital subchannel on virtual channel 21.3, which became a charter affiliate of the sci-fi network Comet, which is owned by Sinclair and operated by Metro-Goldwyn-Mayer under a management agreement with the group. WTTO-DT4 On June 1, 2017, GetTV was replaced with TBD, a digital subchannel which is owned by Sinclair and targeting millennial audiences. Programming WTTO/WDBB carries the entire CW network schedule. Until 2017, the station carried the network's educational program block, One Magnificent Morning, one hour earlier than the network-recommended time of 7:00 a.m. on most Saturdays during the fall and winter months in order to accommodate sports programming from the ACC Network; in this case, the block was transmitted to the station via the network's Eastern Time Zone feed. This changed on October