“Three Rivers” (9 p.m., CBS): Haven’t had your fill of medical dramas? Behold

“Three Rivers” (9 p.m., CBS): Haven’t had your fill of medical dramas? Behold “Three Rivers.” Set in Pittsburgh, it follows a team of organ transplant specialists. Alex O’Loughlin and Alfre Woodard star.

“Curb Your Enthusiasm” (9 p.m., HBO): The “Seinfeld” gang arrives on “Curb Your Enthusiasm” as Larry (Larry David) hatches a reunion show mainly to woo back his estranged wife (Cheryl Hines) — not that there’s anything wrong with that.

“Dexter” (9 p.m., Showtime): On “Dexter,” our stressed-out serial killer misplaces crucial evidence in a case. Will his carelessness come back to haunt him?