The speed up/slowdown scenes are occasionally used to mask actors breaking, or to disguise a change between takes.
Stephen Mangan and Michelle Gomez have a tendency to improvise - the scene between Guy and Sue White where Guy is holding a child is entirely improvised, for example.
Filmed at Northwick Park Hospital, Harrow
The show contains both the onscreen and off-screen love interest of Jack Davenport. Sarah Alexander who played Steve's (Davenport's) fiancée Susan from Coupling, and Jack Davenport's real life wife Michelle Gomez.
The same actress (Rosie Cavaliero) plays both Robbie's teacher in series 1 and Dr. Statham's voice therapist in series 2.