I

Ian Barton

• Shows: Mastermind (1981, 1995).

Ian Bayley

• Shows: University Challenge (, 2000-2001)

Ian Ligo

• Shows: 100 percent

Ian McKillop

• Shows: Mastermind (1985).

Ian Meadows

• Shows: Mastermind (1985).

Ian Pickering

• Shows: Fifteen to One.

Ian Potts

• Shows: Fifteen to One.

Ian Wynn-Mackenzie

• Shows: Fifteen to One.

Ingram Wilcox

• Shows: Mastermind (1980).

Isabelle Heward

• Shows: Mastermind (1983, 1996), Fifteen to One.

Ivan Limmer

• Shows: Mastermind (1972, 1997).