Throughout the nine series (and four Christmas specials) there were several different members of the Bag and Shirt family. I've made a family tree to see how each character is related - you'd be surprised how many bag family members there are! And as Tabatha Bag says 'guess which one's the sap.'

The Bag Family Tree

A to Z of The Bag Family

Candy Bag
Candy Bag is mentioned in The Amazing Adventures Of T-Bag book but not as any specific relation.

Chip Bag
Chip Bag is mentioned in The Amazing Adventures Of T-Bag book but not as any specific relation.

Commander Bin Bag (played by Gilly Coman)
No mention is made of any direct relation to Tabatha Bag. Appears in Take Off With T. Bag episode 8 only

Doctor StrangeBag (played by Trevor Peacock)
No mention is made of any direct relation to Tabatha Bag. Appears in Take Off With T. Bag episode 5 and 10 only.

Doggy Bag
Doggy Bag is Granny Bag's pet dog, he appears in Take Off With T. Bag ep1 and 10 and is also mentioned in The Amazing Adventures Of T-Bag book.

Granny Bag (played by Denise Coffey)
Appears in T. Bag and the Rings of Olympus (episode 6) and T. Bag and the Sunstones of Montezuma (episode nine) and also appears in the first and last episode of Take Off With T. Bag

Gunter Kashbag Bag (played by Peter Majer)
Claude deTerre mentions that he must be a distant relative of Kit Bag but not any more specific. Appears in Take Off With T. Bag episode 4 only

Hedda Hoofer-Bag (played by )
No mention is made of any direct relation to Tabatha Bag. Appears in Take Off With T. Bag episode 9 only.

Kit Bag (played by Georgina Hale)
Is an ancestor of Tabatha Bag (and bears a shocking resemblance to Georgina Hale), T-Shirt calls refers to her as T-Bag's Auntie. Kit Bag appears in T. Bag and the Sunstones of Montezuma (ep1 and ep10)

Kit Bag
Not to be confused with the previous Kit Bag. Kit Bag is mentioned in The Amazing Adventures Of T-Bag book as Tallulah Bag's cousin.

Lucky Bag
Lucky Bag is mentioned in The Amazing Adventures Of T-Bag book as Tallulah Bag's Auntie.

Mumsie Bag (played by Peggy Mount)
Appears in T. Bag's Christmas Turkey (1991 Christmas Special)

Olwynn De Bag (played by Jan Ravens)
No mention is made of any direct relation to Tabatha Bag. Appears in Take Off With T. Bag episode 7 only.

Queen Tallulah of The Nile (played by Elizabeth Estensen)
Queen Tallulah of The Nile is and ancestor of Tallulah Bag, she is refered to as her Great, great, great, great, great... grandmother. She appears in Turn On To T-Bag episode 5.

Tabatha Bag (played by Georgina Hale)
Appears in the last four series and the final two Christmas specials

Tallulah Bag (played by Elizabeth Estensen)
Appears in the first five series and the first two Christmas specials

Vanity Bag (played by Glenda Jackson)
Vanity Bag is Tabatha Bag's stuck-up cousin. Appears in T. Bag's Christmas Ding-Dong only

The Shirt Family Tree

A to Z of The Shirt Family

Sir Paisley Shirt (played by John Hasler)
Appears in T. Bag and the Sunstones of Montezuma episode one and is mentioned as T-Shirt's Grandfather.

Thomas' Grandfather (played by Jim Norton)
Appears in Wonders In Letterland ep1 and 10 (we only find out in ep 10 he is Thomas' Grandfather back in the curiosity shop), he has been included here for completeness.

T-Shirt aka Thomas (played by John Hasler)
Appears in every T-Bag episode except the first episode of Wonders In Letterland.

Tow-Ling Shirt (played by Bea Julakasiun)
Tow-Ling is T-Shirt's cousin, he appears in all ten episodes of Take Off With T. Bag.