In January 1998, CBS entered into an agreement with the Canada-based animation studio Nelvana to program the Saturday morning time slot allocated to children and replace the network-programmed block Think CBS Kids.

[2] The new block featured several first-run series co-produced by Nelvana, CBS and Scottish Television such as Anatole, Mythic Warriors, Rescue Heroes and Flying Rhino Junior High.

[3] The premiere of Mythic Warriors was further delayed due to its complicated animation techniques; reruns of Tales from the Cryptkeeper (with a revival airing a year later) aired in Mythic Warriors' timeslot until it premiered on November 7.

[4] Prior to the deal, former Nick Jr. series Rupert moved to the CBS Kidshow block in January 1999, as part of an agreement in which both it and another animated series, Franklin, swapped networks (with Franklin moving from CBS to the Nick Jr. block on Nickelodeon).

Other stations pre-empted some programs outright for these same reasons, as well as due to professional and college sports broadcasts scheduled by CBS (especially in the case of college football and basketball tournaments) or its stations (primarily through sports syndication services), although most affiliates aired the block in its entirety.