Chain Links

You are probably unfamiliar with the name Frigyes Karithy - but you may have heard of the theory of Six Degrees Of Separation. In 1929, this Hungarian wrote a play called Chains in which he propounds the idea that everyone in the world is six [or fewer] steps away from every other, and that we can all be connected if only we know the right 'friend of a friend' questions to ask. 
There's a trivia game called Six Degrees of Kevin Bacon, where people try and connect another actor to KB in 6 or fewer steps, by linking co-stars of successive films/adverts. KB himself has embraced the concept, and uses it in his EE telecom ads - and has even set up a charitable foundation called Six.Degrees.Org.
I decided to try and link two of my favourite actors [Gregory Peck and Martin Shaw] using the six degrees principle. It's enormous fun.
To Kill A Mockingbird is one of my favourite books
Gregory Peck is the wonderful Atticus Finch

One - GP also stars in Roman Holiday with Audrey Hepburn

Two- AH is the eponymous star of My Fair Lady, along with Rex Harrison, and young Jeremy Brett, who plays her suitor, Freddie Eynsford Hill

Three- JB is the best ever [imho] Sherlock Holmes, and his excellent sidekick Dr Watson is played by David Burke

Four - DB is the husband of equally gifted actress Ann Calder Marshall [latterly in Midsomer Murders , Poirot, Dalziel and Pascoe...but a brilliant Cathv Earnshaw in the 1970 Wuthering Heights]

Five - ACM is the mother of actor Tom Burke

Five and a Half [totally unnecessary, but I needed an excuse to put in this picture] TB played Athos, leader of the Three Musketeers, in the recent BBC production. I really enjoyed this - even though it was a distance from the original Dumas novels. I was particularly fascinated by the costumes and attention to detail. The men in blue and coppery browns, the women in beautifully stitched dresses...

Six - TB is the new star of Strike. Cormoran Strike is the detective from the pen of Robert Galbraith [aka JK Rowling] and the Bank Holiday story "The Cuckoo's Calling" features Martin Shaw as the Uncle of the deceased girl.

Peck-Hepburn-Brett-CalderMarshall -Burke-Shaw
Technically I guess that counts as only five degrees [four if you go straight from David to his son] Oh never mind...
Can you link your favourite actors like this?