What yaer did MacFarlane come up with the idea for " Family Guy " ?
In addition to writing three episodes , " Death Has a Shadow " , " Family Guy Viewer Mail 1 " and " North by North Quahog " , MacFarlane voices " Family Guy " 's main male characters – Peter Griffin , Stewie Griffin , Brian Griffin , and Glenn Quagmire as well as Tom Tucker , his son Jake Tucker , and additional characters .