Starry architects Purves and Pekkala are offered the chance to redesign a Georgian church, but when the head of Scottish Heritage falls from the church tower in a mysterious accident, it becomes a question of whether he fell or was pushed.
| Actor | Role |
|---|---|
 Mark GatissDuff Purves | Duff Purves |
 Max BremerMikko Pekkala | Mikko Pekkala |
 Daniela NardiniMeredith | Meredith |
 Paul HigginsHamish | Hamish |
 Omid DjaliliWalter | Walter |
 Gabriel QuigleyShona | Shona |
 Rose LeslieRhina | Rhina |
| EEdith MacArthurMrs MacIver | Mrs MacIver |
 Duncan DuffErnst | Ernst |
| CCatherine MurrayYvette | Yvette |
 Mathew BayntonDerrin | Derrin |