 Actor Lennard Pearce died from a heart attack soon after filming of the fourth series got underway and had already filmed several scenes for "Hole in One".John Sullivan wrote two new episodes, "Happy Returns" and "Strained Relations", the latter of which featured Grandad's funeral.Once Buster Merryfield joined the cast, the "Hole in One" scenes already filmed by Pearce were reshot (an original shot of Mike looking up [at Grandad] from the Nag's Head cellar was retained).