Scratch was a member of the Harmony Shoal. On behalf of the Shoal, he met River Song and the Twelfth Doctor aboard the Harmony and Redemption to buy the Halassi Androvar. To prevent double-crossing, the Shoal had occupied the entire dining room. Agreeing to River's terms, Scratch gave her a device concealed within his head that could transfer the payment to any bank in the galaxy. He then announced that the Androvar would honour their beloved King Hydroflax. Scratch was enraged upon discovering
Doctor Who review: 'The Husbands of River Song' is not a classic, but good fun after a few sherries
The Husbands of River Song' (TV)
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Scratch (The Husbands of River Song), Tardis
Doctor Who: The Husbands of River Song (2015) — The Movie Database (TMDB)
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It's like loving the stars themselves.” – Doctor Who Recap, “The Husbands Of River Song”