U.S. network ABC says it has taken its Anthony Edwards-starring mystery adventure series \"Zero Hour\" off its schedule after three weeks due to low ratings. The network confirmed the news to EW.com Friday. Repeat episodes of \"Shark Tank\" will air in the \"Zero Hour\" 8 p.m. Thursday time slot for the next two weeks, followed by fresh installments of \"Wife Swap,\" starting March 21. EW.com said ABC might broadcast the remaining \"Zero Hour\" episodes this summer.