Series 4 gets its first airing on BBC2 tonight. In the hot - and we imagine smelly - summer of 1540, the heatwave heightens hidden passions in Henry's court, as he reveals his marriage to teenager, Katherine Howard, She is to be his fifth wife - but her beauty and chequered past (and the fact that she's a giddy fifteen-year-old) inflame the passions of the king's trusted courtier Thomas Culpepper. Starring Jonathan Rhys Meyers, Tamzin Merchant and Torrance Coombs. Following at 10.40pm is another series opener for BBC2; Nurse Jackie. After breaking up with Eddie, Jackie tries to reconnect with her family, but she reaches the end of her tether when her ex-lover overdoses - and she runs out of drugs. Edie Falco stars in the black comedy about a no-nonsense ER nurse with one or two issues.