Here is a brief guide to the Tomorrow people that appeared in Look-in, via the title bars that appeared each week.

1973: The first four Homo-superiors left to right, Kenny (Stephen Salmon),
Stephen Jameson (Peter Vaughn-Clarke), Carol (Sammie Winmill)
and John, the TP's unofficial leader (Nicholas Young).
Incidentally the voice of TIM was played by the late Phillip Gilbert.

1974: Kenny and Carol depart to live on the Galactic Trig for a while, and in comes schoolteacher, Elizabeth Umnondo (Elizabeth Adare, centre).

1975: The three are Joined by Tyso Boswell, the gypsy boy (Dean Lawrence, far right).

1976: Four became five, in came Mike Bell (Mike Holoway, centre),
who led a double life as the drummer of pop band Flintlock.

1977: back down to three when Stephen and Tyso leave the group.

Other TPs who didn't make it into Look-in: Hsui Tai (Masako Koba), although
she did appear in a strip in one of the annuals, and Andrew (Nigel Rhodes).