Timer, now voiced by Len Weinrib, returns to the ABC Afterschool Special in "The Magical Mystery Trip Through Little Red's Head", first shown in May 1974.
This time, the episode is all animated (another DePatie-Freleng production, don'tcha know), as Timer leads two kids through the title character's cranium.
Unfortunately, the complete episode is not available on YouTube. We'll settle for this sample clip.
As we know, Timer would get his own series of interstitals that aired on Saturdays for the next couple of decades, but his two Afterschool Specials haven't seen the light of day since their last broadcasts. You might say, that Time For Timer was the first Saturday morning series DFE would sell to ABC, but they'd only be able to sell three more after that (The Oddball Couple, The New Pink Panther Show, & Spider-Woman, all between 1975-9).