Why is Mike Brady Hiding in The Neighbor's Yard?

Where is he coming from?  I imagine this was just poorly edited, maybe there was some setup to it they didn't show. 

Tannis G Montgomery

The Rookies 1973

Cannon 1975

MacGyver 1986

"Greg's Triangle" 1972

1970s Gas Prices

S.W.A.T 1975

Adam-12 1973

Wanda Bailey, The Girl With Jan Brady's Iconic 4th Season Look

The Rookies 1974

also James Carroll Jordan, Tyne Daly, Robert Walden

Wanda was on The Dean Martin Show, and one of the a Dingaling Sisters.