“The Best Laid Plans, A Contrabassoon and A Sinking Feeling” – Darlene struggles to cope with the stress of construction; and after a serious accident, she reevaluates everything and makes a life-changing decision. Elsewhere, Lou, a familiar face from the past, returns as Mark’s combative contrabassoon teacher; but after he butts heads with Mark, Dan steps in, only to realize that their similarities may outweigh their differences on “The Conners,” SUNDAY, SEPT. 4 (7:00-7:30 p.m. EDT), on ABC. (TV-PG, DLV) Watch episodes on demand and on Hulu the day following their premieres. (Rebroadcast. OAD: 5/4/22)