He looked the same as he did in the Brady bunch. What a difference in programming they had back in the day compared to today.

Another notable guest in S6 is a very young Diana Millay, in different roles--two episodes very close together, near the end (Love and Learn and Not His Type). You have to think some other bit-part actress was unavailable for some reason, close to filming time.

I'm most familiar with her thru her two interesting storylines on Dark Shadows.

Also, James Franciscus as a service station operator (Bud, the Willing Worker), David White as a guy who has a low opinion of Frank (Natividad Vacio) (The Gardener's Big Day), and Marion Ross in a brief part as the manager of a pool where Kathy swims (Jim's Big Surprise).

A young Robert Reed's appearance is in The Imposter.

Robert Vaughn (Season 3), Dick York (Season 5), and Susan Oliver (Season 4) are also among the noteworthy guests.