Index I
I is for... Interruption - Where a contestant has pressed their buzzer before the host has finished reading out the question. Interruptions are generally discouraged in quiz shows since they prevent the viewer from answering the question. Interruptions can be reduced or eliminated by introducing a swerve to some questions, fining contestants for incorrect interruptions, or disabling the buzzers until the question has been read out.
Shows
| Title | Genre |
| I Blame the Spice Girls | Comedy panel game (television) |
| I Can Do That | Childrens |
| Ice Warriors | Action/adventure |
| I'd Do Anything | Stunt/dare show |
| Identity | Puzzle |
| If I Ruled the World... | Comedy panel game (politics) |
| I'm an Aussie... Get Me Out of Here! | Reality |
| I'm a Celebrity... Get Me Out of Here! | Reality |
| I'm Famous and Frightened! | Reality |
| Impromptu | Comedy panel game |
| I'm Sorry I Haven't a Clue | Radio, comedy panel game |
| I'm the Answer | Quiz, general knowledge |
| Incognito | Puzzle |
| Incredible Games | Childrens |
| The Indoor League | Sports |
| In It to Win It | Quiz, general knowledge |
| In My Opinion | Panel game |
| Innovation Nation | Technological |
| Inn Quiz | Quiz, general knowledge |
| Inside Clyde | Childrens |
| Insides Out | Childrens |
| Inspiration! | Radio quiz, themed (science and inventions) |
| Interior Rivalry | Lifestyle, business |
| Interpub | Quiz, general knowledge |
| Intellect | Puzzle |
| Interceptor | Action/adventure |
| International King of Sports | Sports |
| The Interrogators | Action/Adventure |
| In the Dark | Stunt/dare show |
| In the Grid | Family game show |
| Intuition | Family game show |
| Invasion Wales | Quiz, themed (Wales) |
| I Suppose You Think That's Funny | Comedy panel game (about comedy) |
| It's a Knockout/Jeux Sans Frontieres | Stunt/dare show |
| It's Anybody's Guess | Family game show |
| It's Anyone's Game | Regional quiz, themed (sports) |
| It's a Shame! | Childrens |
| It's Beadle | Stunt/dare show |
| It's Not the Answer | Quiz, general knowledge |
| It's Only TV... But I Like It | Quiz, themed (television) |
| It's Patently Obvious | Panel game |
| It's Torture! (Motormouth) | Childrens |
| It's Tough at the Top | Childrens |
| It's Your Word | Childrens |
| ITV Play | Puzzle |
| ITV Soap Challenge | Quiz, themed (ITV soap operas) |
| I've Got a Secret | Panel game |
