Return from Witch Mountain (1978), or maybe his superlative performance as a racist in tight jeans who has a change of heart on The Jeffersons that they don't remember a decade of buddy-bonding and tight jeans.
2. The Fantastic Journey (1977), which had nothing to do with either of the two similarly titled movies (one about shrinking scientists, and the other about a dog and cat finding their way home). This one was a precursor of Lost, about people from various times and places trapped on an island in the Bermuda Triangle. Ike played the teenage Scott Jordan, who hung out with the mysterious Varian (Jared Martin). There was also a prissy gay-coded villain, played by Roddy McDowell.
4. The "Phantom of the Roller Coaster" episode of Wonder Woman (1979). Roller coaster enthusiast Randy (Ike), who again wears extremely tight jeans, buddy-bonds with David (Jared Martin again), without realizing that David's disfigured twin brother is the sinister "phantom."