Series 21

1. Different Worlds: Part 1

2. Different Worlds: Part 2

3. Waste of Space

4. Heads Together

5. Sons and Lovers

6. Angels and Demons

7. What You See Is What You Get

8. Born to Be Wild

9. To Be a Parent

10. It's Now or Never

11. All Through the Night

12. No Place Like...

13. The Edge of Fear

14. In Good Faith

15. Killing Me Softly

16. Silent Night

17. The Sunny Side of the Street: Part 1

18. The Sunny Side of the Street: Part 2

19. Fish Out of Water

20. Stormy Weather

21. The Personal Touch

22. Countdown

23. The Silence of Friends

24. No Return

25. The Miracle on Harry's Last Shift

26. The Killing Floor

27. Combat Indicators: Part 1

28. Combat Indicators: Part 2

29. Sweet Charity

A special episode to link in with the Red Nose Day charity appeal.

30. A World Elsewhere

31. Stitch

32. Life's Too Short

33. Day One

34. Lost in the Rough

35. Lush

36. Aliens

37. Close Encounters

38. A Long Way From Home

39. The Apostate

40. Communion

41. Brass in Pocket

42. Entropy

43. It Never Rains...

44. Lie to Me

45. The Fires Within

46. Walking the Line

47. Seize the Day

48. To Love You So