The Hep Stars were on the show. It's unclear what they performed, but probably Sunny Girl, which was their current single.

Other guests on the show were The Lovin’ Spoonful, Ola & The Janglers, Peggy March and Bennie Thomas.

Click here for a TV listing from Friheten - 21 April 1966, p.7.

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Drop-In, (Benny), 1965;
Drop-In, (Benny), 1966;

Thanks to Carl Magnus Palm and Jozsef.