What is polythene? Who was Pam? In this season's bonus episode, we explore the complete backstory behind Abbey Road's 'Polythene Pam'.

I am thrilled to be joined by master researcher Mark Lewisohn for this special season finale. Mark discusses his methods, decades of research and the extraordinary amount of detail that goes into all his books.

For all things Mark Lewisohn, visit his website.

This week we separate fact from fiction in the mythology around The Beatles' 1963 UK tour with Roy Orbison.

One of the chapter's in The Beatles' history that fascinates me the most is their 1968 trip to India. In this week's episode, I am joined by author and researcher Paul Mason to discuss when and why each of the group chose to leave the Maharishi's ashram in Rishikesh.

There is so much to look at on the cover of Sgt Pepper's Lonely Hearts Club Band that it is easy to miss the sets of six medals that both John and Ringo wore on their colourful military costumes. Join me this week to explore the stories behind these unaccountable artefacts.

Who was Jim Gretty and what chord did he teach The Beatles? More importantly, how did the group integrate this chord into their songs and arrangements? This week, we analyse another juicy, sometimes misunderstood chord.

Returning guests and Lennonology authors extraordinaire Chip Madinger & Scott Raile join me this week to discuss all aspects of The Beatles' MBE awards. As we explore this topic from receipt to John's return, we make a few exciting discoveries along the way!

For all things Lennonology go to https://lennonology.com/

The history of when Paul McCartney wrote 'Yesterday' has been confused by contradictory memories. In this week's episode, we explore the gestation of a classic and I make the case for what I think is the most accurate timeline.

For the first episode of Season 5, I am joined by musician/composer Rob Collier to tackle an age old debate. Who played bass on 'She Said She Said'? Did Paul McCartney participate? From the song's conception through recording, we examine the available evidence. Check out Rob's blog, YouTube and Instagram.

Season 5 of Gimme Some Truth incoming! New episodes every Wednesday starting next week.