Cold Case, 8.30pm, Nine In long ago 1984, a father is proud because his son has qualified for the junior Olympic training program in wrestling. But daddy is not proud of his directionless younger son, who soon goes missing, and whose skeleton is found more than 20 years later by builders on a construction site. Sounds like a job for Cold Case . House, 8.30pm, Ten A sex worker, a fox in sheep’s clothing, turns up at the house of a nervous, middle- aged . . . woman. Just as the client is about to pay in advance, she passes out cold. The sex worker, the original whore with a heart of a gold, sticks around at the hospital. Unfortunately, House, the only doctor who can fix anything, is on a plane with Cuddy and a troop of seriously ill passengers high above the North Pole. Hyperdrive, 9.30pm, ABC An asteroid looking suspiciously like a giant potato appears on the horizon. Peace talks over ownership are to be hosted by Commander Henderson ( Nick Frost, pictured). ‘‘ Let’s talk, man to thing, to, um thingie,’’ Henderson says. My remote, s’il vous plait . . . Medium, 9.30pm, Ten Alison feels cold and her dreams take her to a snowstorm in a pine forest. She seems happy enough, until a blizzard sets in. Joe has to face his first day back at work after the trauma of the siege a few episodes ago. Surprise, surprise, there’s a killer on the loose who freezes his victims.