Felix is pretty certain his wife is up to something with her boss Dmitri, so he decides to hire some help to prove things one way or the other. When professional lip-reader Iris arrives with her powerful binoculars, the couple stake out a hotel bedroom and start to gather their evidence.

• Reece Shearsmith
• Steve Pemberton

• Sophie Thompson
• Nikki Amuka-Bird
• Conleth Hill