Index I
I is for... Isolation booth - A see-through box which a contestant sits inside so that they cannot hear what is going on in the rest of the studio. This might be for the purposes of a "matching responses"-type game, or to ensure that the contestant does not hear any answers from the studio audience. In Twenty-One, both players spent the entire game in their isolation booths, enabling each player to answer questions and decide when to stop without any knowledge of their opponent's situation.
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 (1) | Stunt/dare show |
| I'd Do Anything (2) | Variety, reality |
| Identity | Decision making |
| 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 Edible Challenge | Stunt/dare show |
| Incredible Games | Childrens |
| Indecent Proposals | Stunt/dare show |
| 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 a Mystery | Panel game |
| 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 |
