| Cluedo was a UK television game show based on the board game of the same name. Each week, a reenactment of the murder at the stately home Arlington Grange of a visiting guest was played and, through a combination of interrogating the suspects and deduction, celebrity guests had to discover who committed the murder, which of six weapons and in which room it was committed, whilst viewers were invited to play along at home. |
| Name | Character | Episodes |
|---|---|---|
| Richard Madeley | Himself - Presenter | 12 |
| Joanna Lumley | Mrs. Peacock | 6 |
| Pam Ferris | Mrs. White | 6 |
| Lysette Anthony | Miss Scarlett | 6 |
| John Bird | Professor Plum | 6 |
| Rula Lenska | Mrs. Peacock | 6 |
| David McCallum | Professor Plum | 6 |
| Susan George | Mrs. Peacock | 6 |
| Richard Wilson | Reverend Green | 6 |
| Lewis Collins | Colonel Mustard | 6 |
| Tom Baker | Professor Plum | 6 |
| Kristoffer Tabori | Professor Peter Plum | 6 |
| Stephanie Beacham | Mrs. Elizabeth Peacock | 6 |
| Jerry Hall | Miss Scarlett | 6 |
| Koo Stark | Miss Scarlett | 6 |
| Robin Nedwell | Reverend Jonathan Green | 6 |
| Michael Jayston | Colonel Mustard | 6 |
| Robin Ellis | Colonel Mike Mustard | 6 |
| Christopher Biggins | Reverend Green | 6 |
| Liz Smith | Mrs. White | 6 |
| Nicholas Parsons | Reverend Green | 6 |
| Chris Tarrant | Himself - Presenter | 6 |
| Leslie Grantham | Colonel Mustard | 6 |
| Mollie Sugden | Mrs. White | 6 |
| June Whitfield | Mrs. Blance White | 6 |
| Edward Fox | Himself | 1 |
| Ian Lavender | Professor Plum | 1 |
| Sean Pertwee | Richard Forrest | 1 |
| Art Malik | Bernard Kirkbride | 1 |
| Caroline Langrishe | 1 | |
| Kate O'Mara | Mrs. Peacock | 1 |
| Toyah Willcox | Miss Scarlett | 1 |
| Joan Sims | Mrs. White | 1 |
| Keith Barron | Himself | 1 |
| Simon Williams | Mr. Chapman | 1 |
| Lewis Collins | Jack Peacock | 1 |
| Carmen Silvera | Herself | 1 |
| Joanna David | Herself | 1 |
| Nickolas Grace | Peregrine Talbot-Wheeler | 1 |
| Keith Chegwin | Himself | 1 |
| Amanda Barrie | Herself | 1 |
| Richard O'Brien | Himself | 1 |
| David Yip | Himself | 1 |
| Neil Morrissey | Gordon Ferrar | 1 |
| Joanna Van Gyseghem | Mrs. Hope | 1 |
| Oliver Tobias | Comte Henri de Beauchamp | 1 |
| Edward Hardwicke | Himself | 1 |
| David Robb | Colonel Mustard | 1 |
| Andrew Sachs | Himself | 1 |
| Mark Eden | George Biddle | 1 |
| Christopher Guard | Dave | 1 |
| Nicholas Ball | Mr. Hall | 1 |
| Sharon Maughan | Marie Anne Kray | 1 |
| Michelle Collins | Herself | 1 |
| Anna Carteret | Herself | 1 |
| Tony Slattery | Himself | 1 |
| Mike Read | Himself | 1 |
| Tony Scannell | Himself - Special Guest | 1 |
| Jim Bowen | Himself | 1 |
| Andrew O'Connor | Himself | 1 |
| Leslie Grantham | Himself - Special Guest | 1 |
| Barrie Cookson | The Minister | 1 |
| Ruth Madoc | Miss Terry | 1 |
| Matthew Kelly | Himself | 1 |
| Lorraine Kelly | Herself | 1 |
| Richard Madeley | Himself | 1 |
| George Layton | Himself | 1 |
| Michaela Strachan | Herself | 1 |
| Frances White | Biddle's Assistant | 1 |
| Gaby Roslin | Herself | 1 |
| Johnny Ball | Himself | 1 |
| Paul Darrow | Mr. Hope | 1 |
| Nina Myskow | Herself | 1 |
| Nick Berry | The Window Cleaner | 1 |
| Judy Finnigan | Herself | 1 |
| Derek Nimmo | Reverend Green | 1 |
| Ned Sherrin | Himself | 1 |
| Frank Bough | Himself | 1 |
| Andy Crane | Self | 1 |
| Thelma Barlow | Herself | 1 |
| Nanette Newman | Herself | 1 |