Index O
O is for... Out of vision - (For short: OOV) Any situation when the source of the audio track is different to that of the broadcast pictures. In game shows, the host or question master is said to be out of vision when we hear them asking the questions but do not see them on camera - notable examples are Robin Houston on 100% and Nicholas Rowe on Grand Slam.
Shows
| Title | Genre |
| The Object in Question | Panel game |
| Oblivious | Quiz, general knowledge |
| Oci Oci Oci! | Quiz / darts, regional (Wales) |
| Odd One In | Comedy panel game |
| Odd One Out | Quiz, general knowledge |
| O Dro I Dro | Regional (Wales) quiz |
| Off By Heart | Variety, recital |
| Off the Cuff | Radio, panel game (music) |
| Office Monkey | Stunts and dares |
| Oh, For a Dictionary | Radio, themed quiz (spelling and definitions) |
| Oh Yes It Is, Oh No It Isn't | Variety (pantomimes), radio, regional (Scotland) |
| Old Flames | Dating |
| The Olympic Game | Sports |
| Once Upon a Time | Panel game |
| The One and Only | Variety |
| One False Move | Quiz, general knowledge |
| O Fan i Fan | Adventure, regional (Wales) |
| On Cue | Radio, Panel game |
| One and Six Zeros | Big prize quiz, general knowledge |
| 100 Grand in 100 Minutes | Radio, Lifestyle |
| 101 Ways to Leave a Gameshow | Family game show |
| 100% | Quiz, general knowledge |
| One Hundred and Eighty | Sports |
| One Man and His Dog | Lifestyle |
| One Minute Please | Panel game, Radio |
| One of the Family | Panel game |
| One Night Only | Comedy panel game, radio |
| The 1% Club | Quiz, puzzles |
| One Question | Quiz, general knowledge |
| 1001 Things You Should Know | Quiz, general knowledge |
| 1000 to 1 | Children's |
| One to Win (1) | Quiz, general knowledge |
| One to Win (2) | Quiz, general knowledge |
| 1-2-3 Click | Panel game |
| 1 vs 100 | Quiz, general knowledge |
| Only Connect (1) | Radio, panel game |
| Only Connect (2) | Puzzle |
| Only Fools On Horses | Sport, Reality |
| Only Joking | Family game show, jokes |
| On Safari (1) | Family game show |
| On Safari (2) | Childrens |
| On Stage | Themed quiz (theatre), radio |
| On the Air | Themed quiz (nostalgia), radio |
| On The Ball | Sport, regional (North West England) |
| On the Spot (1) | Quiz, general knowledge |
| On the Spot (2) | Educational |
| On the Spot (3) | Sport, childrens |
| On Your Marks | Quiz, academic |
| Oops! | Panel game |
| Opera Quiz | Radio, themed quiz (opera) |
| Operatunity | Variety |
| Opportunity Knocks | Variety |
| Orange UnsignedAct | Variety, reality |
| Ordinary People | Regional (South West) quiz |
| The Other Boat Race | Sports |
| The Other Half | Dating show |
| Our Survey Said | Documentary |
| Out of Order | Radio quiz, themed (politics) |
| Out of the Box | Quiz, themed (television) |
| Out on a Limb | Quiz, themed (celebrity) |
| Outsiders | Stunts and dares |
| Over the Rainbow | Variety, reality |
