From Coronation Street Wiki
Tommo and Dave follow Mike and Ernie back to the factory. Emily plans a summer holiday abroad. Hilda is bitter that she hasn't got a colour TV. Eddie promises to get her one. Steve is embarrassed when the factory girls tease him about Suzie. Renee is flattered when Alf rings her from London. Ernie makes up the wages. Eddie gives Hilda a green and blue screen to put on the black and white TV. She thinks it's useless and refuses to have it. Tommo and Dave, with shotgun demand the wages from Ernie. He is in the middle of handing it over when Mike comes into the wages' office. Tommo fires the gun and Ernie hits the floor. Mike calls an ambulance as he's still breathing.
This episode was included on the 1978 disc of the Network DVD collection Coronation Street: The 1970s, released in 2005.